feat(certifi): user certifi as a fallback when system store is not present - #6231
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LLM client uses httpx, which falls back to certifi's CA bundle, while STT/TTS plugins go through a shared aiohttp session that relied solely on the host's system trust store. On hosts without a resolvable system store (minimal containers, distroless images missing ca-certificates), aiohttp-based TLS would fail while the LLM client kept working.
The shared TCPConnector now builds its SSL context to: (1) honor
SSL_CERT_FILE/SSL_CERT_DIRenv overrides, (2) prefer the system trust store, and (3) fall back to certifi only when no system store is resolvable on disk. This gives consistent TLS trust roots across LLM, STT, and TTS without overriding custom system CAs when a store is present.The fix is also applied to the worker and job process so they can both use
certifias a fallback