feat: format and lint oracle tts asr

[YiminW]

Note

Low Risk
Primarily typing/formatting cleanups and small refactors (e.g., Path.is_file, safer task-cancel handling) with minimal behavioral impact; low risk aside from minor edge-case differences in file checks and error messaging.

Overview
Updates the Oracle ASR/TTS Python extensions with linting/typing modernizations (PEP585 dict[str, Any], collections.abc imports, signature formatting, trailing commas) and a few small robustness tweaks.

ASR now uses Path(key_file).is_file() for credential file validation and improves websocket shutdown by suppressing CancelledError when cancelling the message task. Both oracle_asr_python and oracle_tts_python manifests are bumped to 0.1.1, and the TTS addon moves the OracleTTSExtension import to module scope.

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