refactor(reporting): enhance timezone handling and clean up migration

- Updated SQL queries in reporting controllers to join with the timezones table for accurate timezone retrieval.
- Refactored ReportingMembersController to extend ReportingControllerBaseWithTimezone for centralized timezone logic.
- Removed obsolete migration file that added a timezone column to the users table, as it is no longer needed.

.claude/settings.local.json

@@ -4,7 +4,9 @@
       "Bash(find:*)",
       "Bash(npm run build:*)",
       "Bash(npm run type-check:*)",
-      "Bash(npm run:*)"
+      "Bash(npm run:*)",
+      "Bash(grep:*)",
+      "Bash(rm:*)"
     ],
     "deny": []
   }