OpenSSL 3.x ignores intermediate CA certs in -CAfile (verify code 20)
but correctly builds chains with -CApath (verify code 0).
All three clients now use capath:
- service.py: ssl.create_default_context(capath=...)
- _llm_http.py: verify='/etc/ssl/certs/'
- preview_llm_client.py: verify='/etc/ssl/certs/'
check_llm_certs.py rewritten for clarity.
- ADR-0009: comprehensive SSL certificate management strategy
- _get_ssl_verify() returns SSLContext with cafile= instead of bool True
(httpx deprecates verify=<str>, requests needs system CA, not certifi)
- _get_verify() in translate plugin returns system CA path
- All tests updated for SSLContext return type
- All QA findings C1-C3, H1-H4, M1 incorporated into ADR
preview_llm_client.py and _llm_http.py both use requests.post()
without verify=, causing SSLError when corporate CA not in trust store.
Added _get_verify() helper that reads LLM_SSL_VERIFY env var.
