deadlock detected

Nobody has claimed this yet.

I went to run specs on my app locally, and I got a ton of deadlock errors:

```
Unhandled exception in spawn: deadlock detected (PQ::PQError)
from lib/pg/src/pq/connection.cr:203:7 in 'handle_error'
from lib/pg/src/pq/connection.cr:186:7 in 'handle_async_frames'
from lib/pg/src/pq/connection.cr:162:7 in 'read'
from lib/pg/src/pq/connection.cr:414:18 in 'expect_frame'
from lib/pg/src/pq/connection.cr:398:9 in 'read_next_row_start'
from lib/pg/src/pg/result_set.cr:39:8 in 'move_next'
from lib/db/src/db/result_set.cr:39:13 in 'from_rs'
from lib/avram/src/avram/save_operation.cr:367:17 in 'insert'
from lib/avram/src/avram/save_operation.cr:349:7 in 'insert_or_update'
from lib/avram/src/avram/save_operation.cr:297:9 in 'save'
from lib/avram/src/avram/save_operation.cr:321:8 in 'save!'
from lib/breeze/src/breeze/operations/save_breeze_sql_statement.cr:1:1 in 'create!:breeze_request_id:statement:args:model:elapsed_text'
from lib/breeze/src/breeze.cr:14:3 in '->'
from /usr/local/Cellar/crystal/0.36.1_2/src/primitives.cr:255:3 in 'run'
from /usr/local/Cellar/crystal/0.36.1_2/src/fiber.cr:92:34 in '->'
```

I have it set to only enable while in development, so in theory breeze should be skipped during tests... I'll try to dig in more to see what specifically is causing this.

Start with the stack-trace entries in lib/pg/src/pq/connection.cr, lib/avram/src/avram/save_operation.cr, and lib/breeze/src/breeze.cr, then reproduce the deadlock while running the app's specs. Determine why Breeze runs during tests despite being development-only; done means the specs no longer produce these deadlock errors.

Written by the indexing model from the issue text.