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>

src/mcp_familywall/server.py

@@ -510,8 +510,9 @@ def get_categories(list_id: str, locale: str = "de") -> str:
     """Return the task categories available for a list as JSON.
 
     Only shopping lists (taskListType=SHOPPING_LIST) have categories. TODO
-    lists return an empty list. Categories are filtered by locale so only
-    the language-appropriate names are returned (default: German).
+    lists return an empty list. System categories are filtered by locale so only
+    the language-appropriate names are returned (default: German). Custom categories
+    have no locale field and are always displayed regardless of the locale parameter.
 
     Use the returned ``id`` values as the ``category_id`` parameter in
     ``create_task`` and ``update_task``.
@@ -1003,6 +1004,8 @@ def update_task(
 def toggle_task(task_id: str, complete: bool) -> str:
     """Mark a task as complete or incomplete.
 
+    IMPORTANT: Ask the user for confirmation before calling this tool.
+
     Args:
         task_id: Task metaId from get_tasks.
         complete: ``True`` to mark done, ``False`` to reopen.
@@ -1110,8 +1113,9 @@ def clear_list(list_id: str, only_open: bool = False) -> str:
                 try:
                     client.call("metadelete", {"id": meta_id})
                     deleted_ids.append(meta_id)
-                except Exception:
+                except Exception as e:
                     failed_ids.append(meta_id)
+                    logger.warning(f"Failed to delete {meta_id}: {e}")
 
             client.logout()
     except FamilyWallError as exc:
@@ -1782,6 +1786,8 @@ def delete_circle(circle_id: str) -> str:
 def like_post(post_id: str, like: bool = True) -> str:
     """Like a wall post/activity with a STAR mood.
 
+    IMPORTANT: Ask the user for confirmation before calling this tool.
+
     Note: Unlike (like=False) is not yet supported. The Family Wall API offers
     no discoverable endpoint or parameter to remove a like. Passing like=False
     returns an error without making any API call.