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>

CHANGELOG.md

@@ -5,6 +5,30 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Versioning Policy
+
+This project follows Semantic Versioning (SemVer).
+Breaking changes (removed tools, changed parameters) increment the major version.
+
+## [1.0.1] – 2026-04-17
+
+### Added
+- IMPORTANT confirmation notes in docstrings for write operations (`toggle_task`, `like_post`)
+- `[project.urls]` section in `pyproject.toml` with Gitea repository link
+- Language note in CLAUDE.md explaining German/English split
+- `tests/README.md` documentation for running integration tests
+
+### Changed
+- `.gitignore` patterns now recursive (test_*.py without leading slash)
+- CLI help text updated (removed "(read-only)" qualifier)
+- `clear_list()` now logs exception reasons for failed deletions
+- `get_categories()` docstring clarifies custom vs. system category locale behavior
+
+### Fixed
+- Exception handling in `clear_list()` with detailed logging
+
+---
+
 ## [1.0.0] – 2026-04-17
 
 ### Added