Fix prepared cursors with statement cache disabled - #1345
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Summary
Restore the documented auto-generated-name behavior for explicit
Connection.prepare()calls whenstatement_cache_size=0. This prevents internal type-introspection queries from replacing the user's unnamed statement before a cursor can bind it.Changes
_prepare()naming with the statement cache disabledValidation
Adds focused coverage in
tests/test_prepare_naming.py. Full asyncpg tests should run in CI.Fixes #1335