startup crashes on `TypeError: replace() argument 2 must be str, not bytes`, followed by `TypeError: cannot use a string pattern on a bytes-like object`

Installed `pgcli` 4.3.0 using `pip install pgcli` in a Python 3.13 venv (MacOS 15.x, recent Sequoia).

`pgcli` crashes on startup due to a string-handling error (or byte string-handling error). Superficial patches lead to deeper problems during startup.

First I tried to start `pgcli` with the command `pgcli my_database_name`

Got a stacktrace ending with this error, related to handling string versus bytes:
```
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/main.py", line 1051, in get_message
prompt = self.get_prompt(prompt_format)
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/main.py", line 1323, in get_prompt
string = string.replace("\\H", self.pgexecute.host or "(none)")
TypeError: replace() argument 2 must be str, not bytes
```

I modified line 1323 like this, and this initial error went away...
```
string = string.replace("\\H", str(self.pgexecute.host) or "(none)") # HACK added str() 20250802
```

...however then I got the same error from the subsequent line 1324:
```
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/main.py", line 1324, in get_prompt
string = string.replace("\\h", self.pgexecute.short_host or "(none)")
TypeError: replace() argument 2 must be str, not bytes
```

So I modified line 1324 the same way to bypass the error:
```
string = string.replace("\\h", str(self.pgexecute.short_host) or "(none)") # HACK added str() 20250802
```

These two hacks permitted `pgcli` to get farther in start up, however then I received another `TypeError`, seemingly related to the same issues. At this point I gave up debugging it. It should be an easy fix for someone who knows the pgcli codebase.

```
$ pgcli my_database_name

Using local time zone MyCountry/MyCity (server uses b'MyCountry/MyCity')
Use `set time zone ` to override, or set `use_local_timezone = False` in the config

Exception in thread completion_refresh:
Traceback (most recent call last):
File "/opt/homebrew/Cellar/python@3.13/3.13.5/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 1043, in _bootstrap_inner
self.run()
~~~~~~~~^^
File "/opt/homebrew/Cellar/python@3.13/3.13.5/Frameworks/Python.framework/Versions/3.13/lib/python3.13/threading.py", line 994, in run
self._target(*self._args, **self._kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/completion_refresher.py", line 67, in _bg_refresh
refresher(completer, executor)
~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
Server: PostgreSQL 17.5 (Homebrew)
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/completion_refresher.py", line 108, in refresh_schemata
completer.set_search_path(executor.search_path())
~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/pgcompleter.py", line 335, in set_search_path
self.search_path = self.escaped_names(search_path)
~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^

Version: 4.3.0
Home: http://pgcli.com

File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/pgcompleter.py", line 183, in escaped_names
return [self.escape_name(name) for name in names]
~~~~~~~~~~~~~~~~^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/pgcompleter.py", line 164, in escape_name
(not self.name_pattern.match(name))
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^

TypeError: cannot use a string pattern on a bytes-like object

Traceback (most recent call last):
File "/path/to/my/venv/bin/pgcli", line 8, in
sys.exit(cli())
~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/click/core.py", line 1442, in __call__
return self.main(*args, **kwargs)
~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/click/core.py", line 1363, in main
rv = self.invoke(ctx)
File "/path/to/my/venv/lib/python3.13/site-packages/click/core.py", line 1226, in invoke
return ctx.invoke(self.callback, **ctx.params)
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/click/core.py", line 794, in invoke
return callback(*args, **kwargs)
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/main.py", line 1720, in cli
pgcli.run_cli()
~~~~~~~~~~~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/main.py", line 979, in run_cli
text = self.prompt_app.prompt()
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/shortcuts/prompt.py", line 1035, in prompt
return self.app.run(
~~~~~~~~~~~~^
set_exception_handler=set_exception_handler,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<2 lines>...
inputhook=inputhook,
^^^^^^^^^^^^^^^^^^^^
)
^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/application/application.py", line 1002, in run
return asyncio.run(coro)
~~~~~~~~~~~^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.5/Frameworks/Python.framework/Versions/3.13/lib/python3.13/asyncio/runners.py", line 195, in run
return runner.run(main)
~~~~~~~~~~^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.5/Frameworks/Python.framework/Versions/3.13/lib/python3.13/asyncio/runners.py", line 118, in run
return self._loop.run_until_complete(task)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.5/Frameworks/Python.framework/Versions/3.13/lib/python3.13/asyncio/base_events.py", line 725, in run_until_complete
return future.result()
~~~~~~~~~~~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/application/application.py", line 886, in run_async
return await _run_async(f)
^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/application/application.py", line 739, in _run_async
self._redraw()
~~~~~~~~~~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/application/application.py", line 543, in _redraw
self.context.copy().run(run_in_context)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/application/application.py", line 526, in run_in_context
self.renderer.render(self, self.layout)
~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/renderer.py", line 647, in render
layout.container.preferred_height(size.columns, size.rows).preferred,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/layout/containers.py", line 319, in preferred_height
c.preferred_height(width, max_available_height) for c in self._all_children
~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/layout/containers.py", line 786, in preferred_height
return self.content.preferred_height(width, max_available_height)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/layout/containers.py", line 319, in preferred_height
c.preferred_height(width, max_available_height) for c in self._all_children
~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/layout/containers.py", line 2623, in preferred_height
if self.filter():
~~~~~~~~~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/filters/base.py", line 253, in __call__
return self.func()
~~~~~~~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/shortcuts/prompt.py", line 161, in has_before_fragments
for fragment, char, *_ in get_prompt_text():
~~~~~~~~~~~~~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/shortcuts/prompt.py", line 1280, in _get_prompt
return to_formatted_text(self.message, style="class:prompt")
File "/path/to/my/venv/lib/python3.13/site-packages/prompt_toolkit/formatted_text/base.py", line 82, in to_formatted_text
return to_formatted_text(value(), style=style)
~~~~~^^
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/main.py", line 1051, in get_message
prompt = self.get_prompt(prompt_format)
File "/path/to/my/venv/lib/python3.13/site-packages/pgcli/main.py", line 1324, in get_prompt
string = string.replace("\\h", self.pgexecute.short_host or "(none)")

TypeError: replace() argument 2 must be str, not bytes
```

Tái hiện lỗi khởi động với pgcli 4.3.0 trên Python 3.13, sau đó đọc pgcli/main.py quanh các dòng 1323-1324 của get_prompt và pgcli/completion_refresher.py quanh refresh_schemata. Theo dõi các giá trị được truyền vào các phương thức escaped_names và escape_name của pgcompleter.py; hoàn tất khi quá trình khởi động đi đến prompt mà không gặp các TypeErrors string/bytes đã báo cáo.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.