fix: replace 59 bare except clauses with proper logging (#25)

All `except Exception:` now catch as `except Exception as exc:` with
appropriate logging (warning for critical paths, debug for graceful degradation).

Added logger setup to 4 files that lacked it:
- src/timmy/memory/vector_store.py
- src/dashboard/middleware/csrf.py
- src/dashboard/middleware/security_headers.py
- src/spark/memory.py

31 files changed across timmy core, dashboard, infrastructure, integrations.
Zero bare excepts remain. 1340 tests passing.

src/dashboard/middleware/csrf.py

@@ -5,6 +5,7 @@ to protect state-changing endpoints from cross-site request attacks.
 """
 
 import hmac
+import logging
 import secrets
 from collections.abc import Callable
 from functools import wraps
@@ -16,6 +17,8 @@ from starlette.responses import JSONResponse, Response
 # Module-level set to track exempt routes
 _exempt_routes: set[str] = set()
 
+logger = logging.getLogger(__name__)
+
 
 def csrf_exempt(endpoint: Callable) -> Callable:
     """Decorator to mark an endpoint as exempt from CSRF validation.
@@ -278,7 +281,8 @@ class CSRFMiddleware(BaseHTTPMiddleware):
                 form_token = form_data.get(self.form_field)
                 if form_token and validate_csrf_token(str(form_token), csrf_cookie):
                     return True
-            except Exception:
+            except Exception as exc:
+                logger.debug("CSRF form parsing error: %s", exc)
                 # Error parsing form data, treat as invalid
                 pass
 

src/dashboard/middleware/request_logging.py

@@ -115,7 +115,8 @@ class RequestLoggingMiddleware(BaseHTTPMiddleware):
                         "duration_ms": f"{duration_ms:.0f}",
                     },
                 )
-            except Exception:
+            except Exception as exc:
+                logger.debug("Escalation logging error: %s", exc)
                 pass  # never let escalation break the request
 
             # Re-raise the exception

src/dashboard/middleware/security_headers.py

@@ -4,10 +4,14 @@ Adds common security headers to all HTTP responses to improve
 application security posture against various attacks.
 """
 
+import logging
+
 from starlette.middleware.base import BaseHTTPMiddleware
 from starlette.requests import Request
 from starlette.responses import Response
 
+logger = logging.getLogger(__name__)
+
 
 class SecurityHeadersMiddleware(BaseHTTPMiddleware):
     """Middleware to add security headers to all responses.
@@ -130,12 +134,8 @@ class SecurityHeadersMiddleware(BaseHTTPMiddleware):
         """
         try:
             response = await call_next(request)
-        except Exception:
-            import logging
-
-            logging.getLogger(__name__).debug(
-                "Upstream error in security headers middleware", exc_info=True
-            )
+        except Exception as exc:
+            logger.debug("Upstream error in security headers middleware: %s", exc)
             from starlette.responses import PlainTextResponse
 
             response = PlainTextResponse("Internal Server Error", status_code=500)