docs: Add testing TODO for minimal bot refactor

Document which tests need updates after feature removal.

Tests referencing removed features:
- test_verification.py (verification removed)
- test_file_config.py (per-guild config removed)
- test_ai.py (text moderation removed)

conftest.py needs updates for removed model imports.

Core feature tests should still work:
- test_automod.py (spam detection)
- test_nsfw_only_filtering.py (NSFW detection)

TESTING_TODO.md

@@ -0,0 +1,35 @@
+# Testing TODO for Minimal Bot
+
+## Tests That Need Updates
+
+The following test files reference removed features and need to be updated or removed:
+
+### To Remove (Features Removed)
+- `tests/test_verification.py` - Verification system removed
+- `tests/test_file_config.py` - File-based per-guild config removed
+- `tests/test_ai.py` - ModerationResult and text moderation removed
+
+### To Update (Features Changed)
+- `tests/conftest.py` - Remove imports for:
+  - `BannedWord` (removed model)
+  - `ModerationLog`, `Strike`, `UserNote` (removed models)
+  - `GuildDefaults` (if removed from config)
+
+### Tests That Should Still Work
+- `tests/test_automod.py` - Spam detection (core feature)
+- `tests/test_ratelimit.py` - Rate limiting (still used)
+- `tests/test_automod_security.py` - Security tests
+- `tests/test_utils.py` - Utility functions
+- `tests/test_nsfw_only_filtering.py` - NSFW filtering (core feature)
+- `tests/test_config.py` - Config loading
+- `tests/test_database_integration.py` - May need updates for removed models
+
+## Quick Fix
+
+For now, tests can be skipped for removed features. Full test suite cleanup needed later.
+
+## Run Working Tests
+
+```bash
+pytest tests/test_automod.py tests/test_nsfw_only_filtering.py -v
+```