address review nits: pyrefly comment wording + empty-except docs

- pyproject.toml: drop stale baseline wording; state zero-error CI policy
  directly (coderabbit).
- test_request_body_extraction: annotate `except ImportError: pass` as
  skipping adapters whose optional deps aren't installed (github-code-
  quality empty-except flag).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: patrick-chinchill

pyproject.toml

@@ -121,5 +121,4 @@ replace-imports-with-any = [
 ]
 
 [tool.pyrefly.errors]
-# Default severity. Known issues tracked in .pyrefly-baseline.json —
-# new errors fail CI, existing ones are allowed.
+# CI policy: zero pyrefly errors.

tests/test_request_body_extraction.py

@@ -135,23 +135,23 @@ def _adapters() -> list[tuple[str, Any]]:
 
         result.append(("github", GitHubAdapter._get_request_body))
     except ImportError:
-        pass
+        pass  # Optional platform dep missing — skip this adapter's cases.
 
     # Telegram (static method)
     try:
         from chat_sdk.adapters.telegram.adapter import TelegramAdapter
 
         result.append(("telegram", TelegramAdapter._get_request_body))
     except ImportError:
-        pass
+        pass  # Optional platform dep missing — skip this adapter's cases.
 
     # WhatsApp (static method)
     try:
         from chat_sdk.adapters.whatsapp.adapter import WhatsAppAdapter
 
         result.append(("whatsapp", WhatsAppAdapter._get_request_body))
     except ImportError:
-        pass
+        pass  # Optional platform dep missing — skip this adapter's cases.
 
     return result