Suppress TLS tracing debug output, improve Zulip request logging
ocaml-requests: Add automatic suppression of tls.tracing source after
first TLS connection. The source is created lazily by ocaml-tls, so
early logging setup misses it. Now suppressed to Warning level after
first connection unless explicitly set to Debug.
ocaml-zulip: Log full URL with query params in debug output instead of
just the path, making it easier to debug API issues.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>