chore(v1.0.1): opus review findings — docstring confirmation patterns, pyproject.urls, gitignore fix, logging

**Critical:**
- Add IMPORTANT confirmation lines to toggle_task and like_post docstrings
- Add [project.urls] section with Gitea repository link to pyproject.toml

**Medium:**
- Fix .gitignore: test_*.py recursive pattern (remove leading slash)
- Add exception logging to clear_list() for failed deletions
- Update get_categories() docstring: clarify custom vs system category locale behavior
- Add Versioning Policy section to CHANGELOG.md

**Minor:**
- Fix CLI help text (remove "(read-only)" qualifier)
- Add language note to CLAUDE.md (German file, English code)
- Create tests/README.md with integration test documentation
- Update version to 1.0.1 in pyproject.toml

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.gitignore

@@ -42,11 +42,11 @@ htmlcov/
 # uv
 uv.lock
 
-# Debug and probe scripts (root-level only)
-/debug_*.py
-/probe_*.py
-/probe_*.txt
-/probe_out.txt
-/p*_err.txt
-/test_*.py
+# Debug and probe scripts
+debug_*.py
+probe_*.py
+probe_*.txt
+probe_out.txt
+p*_err.txt
+test_*.py
 reference/