security: bandit fixes B310/B324/B110 + QuietHTTPServer (#354)

* security: fix bandit security issues (B310, B324)

- Add usedforsecurity=False to MD5 hash in gateway_watcher.py
- Add URL scheme validation to prevent file:// access in config.py
- Add URL validation to bootstrap.py health check
- Add nosec comments where runtime validation exists

* fix: handle ConnectionResetError gracefully and add debug logging

- Add QuietHTTPServer class to suppress noisy connection reset errors
  caused by clients disconnecting abruptly (fixes log spam from
  'ConnectionResetError: [Errno 54] Connection reset by peer')

- Replace silent 'pass' statements with logger.debug() calls across
  api/auth.py, api/config.py, api/gateway_watcher.py, api/models.py,
  and api/onboarding.py for better observability during troubleshooting

- All tests pass (25 passed in test_regressions.py)

* chore: add debug logging to profiles and routes modules

- Replace silent 'pass' statements with logger.debug() calls in
  api/profiles.py for better error visibility during profile switching
  and module patching

- Add logger initialization to api/routes.py

* security: fix B110 bare except/pass issues (bandit security scan)

- Replace bare except/pass patterns with logger.debug() calls
- Fixes CWE-703 (improper check/handling of exceptional conditions)
- Files affected: routes.py, state_sync.py, streaming.py, workspace.py, server.py
- All tests pass successfully

* security: bandit fixes B310/B324/B110 + QuietHTTPServer (#354)

- api/gateway_watcher.py: MD5 usedforsecurity=False (B324)
- api/config.py, bootstrap.py: URL scheme validation before urlopen (B310)
- 12 files: replace bare except/pass with logger.debug() (B110)
- server.py: QuietHTTPServer suppresses client disconnect log noise
- server.py: fix sys.exc_info() (was traceback.sys.exc_info(), impl detail)
- tests/test_sprint43.py: 19 new tests covering all security fixes
- CHANGELOG.md: v0.50.14 entry; 841 tests total (up from 822)

---------

Co-authored-by: lawrencel1ng <lawrence.ling@global.ntt>
Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>

api/onboarding.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import logging
 import os
 from pathlib import Path
 from urllib.parse import urlparse
@@ -24,6 +25,8 @@ from api.config import (
 )
 from api.workspace import get_last_workspace, load_workspaces
 
+logger = logging.getLogger(__name__)
+
 
 _SUPPORTED_PROVIDER_SETUPS = {
     "openrouter": {
@@ -234,7 +237,7 @@ def _provider_oauth_authenticated(provider: str, hermes_home: "Path") -> bool:
         if isinstance(status, dict) and status.get("logged_in"):
             return True
     except Exception:
-        pass
+        logger.debug("Failed to get auth status for provider %s", provider)
 
     # Fallback: parse auth.json ourselves for known OAuth provider IDs.
     # Covers deployments where hermes_cli is installed but the import above
@@ -486,7 +489,7 @@ def apply_onboarding_setup(body: dict) -> dict:
         from api.profiles import _reload_dotenv
         _reload_dotenv(_get_active_hermes_home())
     except Exception:
-        pass
+        logger.debug("Failed to reload dotenv")
 
     # Belt-and-braces: set directly on os.environ AFTER _reload_dotenv so the
     # value survives even if _reload_dotenv cleared it (e.g. when _write_env_file
@@ -499,7 +502,7 @@ def apply_onboarding_setup(body: dict) -> dict:
         from hermes_cli.config import reload as _cli_reload
         _cli_reload()
     except Exception:
-        pass
+        logger.debug("Failed to reload hermes_cli config")
 
     reload_config()
     return get_onboarding_status()