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/integrations/chat_bridge/vendors/discord.py

@@ -87,7 +87,8 @@ if _DISCORD_UI_AVAILABLE:
                 await action["target"].send(
                     f"Action `{action['tool_name']}` timed out and was auto-rejected."
                 )
-            except Exception:
+            except Exception as exc:
+                logger.warning("Discord action timeout message error: %s", exc)
                 pass
 
 
@@ -186,7 +187,8 @@ class DiscordVendor(ChatPlatform):
         if self._client and not self._client.is_closed():
             try:
                 await self._client.close()
-            except Exception:
+            except Exception as exc:
+                logger.warning("Discord client close error: %s", exc)
                 pass
             self._client = None
 
@@ -330,7 +332,8 @@ class DiscordVendor(ChatPlatform):
 
             if settings.discord_token:
                 return settings.discord_token
-        except Exception:
+        except Exception as exc:
+            logger.warning("Discord token load error: %s", exc)
             pass
 
         # 2. Fall back to state file (set via /discord/setup endpoint)
@@ -458,7 +461,8 @@ class DiscordVendor(ChatPlatform):
         req.reject(note="User rejected from Discord")
         try:
             await continue_chat(action["run_output"], action.get("session_id"))
-        except Exception:
+        except Exception as exc:
+            logger.warning("Discord continue chat error: %s", exc)
             pass
 
         await interaction.response.send_message(

src/integrations/telegram_bot/bot.py

@@ -56,7 +56,8 @@ class TelegramBot:
             from config import settings
 
             return settings.telegram_token or None
-        except Exception:
+        except Exception as exc:
+            logger.warning("Telegram token load error: %s", exc)
             return None
 
     def save_token(self, token: str) -> None: