Increase Postgres connection timeout to 10 seconds (#182)

## Changes
- Increase Postgres connection timeout to 10 seconds
- Remove QueuePool timeout

## Context
Database migrations are occasionally timing out in the
platform-test-flask repo.
Tuning this up to 10 seconds to see if that helps.
Also removing the QueuePool timeout which doesn't seem needed.

app/src/adapters/db/clients/postgres_client.py

@@ -37,7 +37,7 @@ def _configure_engine(self, db_config: PostgresDBConfig) -> sqlalchemy.engine.En
         def get_conn() -> Any:
             return psycopg2.connect(**get_connection_parameters(db_config))
 
-        conn_pool = pool.QueuePool(get_conn, max_overflow=10, pool_size=20, timeout=3)
+        conn_pool = pool.QueuePool(get_conn, max_overflow=10, pool_size=20)
 
         # The URL only needs to specify the dialect, since the connection pool
         # handles the actual connections.
@@ -98,7 +98,7 @@ def get_connection_parameters(db_config: PostgresDBConfig) -> dict[str, Any]:
         password=password,
         port=db_config.port,
         options=f"-c search_path={db_config.db_schema}",
-        connect_timeout=3,
+        connect_timeout=10,
         sslmode=db_config.ssl_mode,
         **connect_args,
     )

app/tests/src/adapters/db/clients/test_postgres_client.py

@@ -50,6 +50,6 @@ def test_get_connection_parameters(monkeypatch: pytest.MonkeyPatch):
         password=db_config.password,
         port=db_config.port,
         options=f"-c search_path={db_config.db_schema}",
-        connect_timeout=3,
+        connect_timeout=10,
         sslmode="require",
     )