remote server returns invalid header error

Dolt v1.59.18

Start a local server that's running remote server.
```yaml
log_level: debug
log_format: text

behavior:
read_only: false
autocommit: true
disable_client_multi_statements: false
dolt_transaction_commit: false
event_scheduler: "ON"
auto_gc_behavior:
enable: false
archive_level: 0

listener:
host: 0.0.0.0
port: 4433
remotesapi:
port: 2222
```

```bash
dolt sql-server --config config.yaml
```

Then try to clone this database to another dolt server.

```bash
local/main> call dolt_clone('http://localhost:2222/local');
Error 1105 (HY000): could not access dolt url 'http://localhost:2222/local': rpc error: code = Unauthenticated desc = bad request: authorization header did not start with 'Basic '
```

Reproduce the failure with the shown config.yaml, dolt sql-server command, and dolt_clone('http://localhost:2222/local') call. Trace the remote-server clone request and its authorization handling, then verify that cloning the local database no longer returns the invalid Basic authorization-header error.

Written by the indexing model from the issue text.