FEATURE: Todos Management Tools (Issue #4)
- Add list_todos tool: filter by state/action/type with pagination
- Add manage_todos tool: mark_done, mark_all_done, restore actions

FEATURE: CQRS Consolidation (Issue #16)
Reduce 18 core tools to 10 by consolidating related operations:
- browse_projects: search/list/get projects (was 3 tools)
- browse_namespaces: list/get/verify namespaces (was 3 tools)
- browse_commits: list/get/diff commits (was 3 tools)
- browse_events: user/project events (was 2 tools)
- manage_repository: create/fork repos (was 2 tools)

FIX: URL encoding in browse_projects
- Fix double-encoding bug where spaces became %2B instead of +
- URLSearchParams now handles encoding correctly

CI: Add semantic-release job permissions
- contents:write, issues:write, pull-requests:write, id-token:write

TEST: Comprehensive unit tests (1337 passing)
- Full coverage for consolidated tools with edge cases
- Todos tools tests: filters, pagination, error handling
- URL encoding tests: spaces, special characters like +

Improve tool descriptions to help agents decide WHEN to use each action:
- browse_projects: clarify search vs list vs get use cases
- browse_namespaces: explain when to verify vs get vs list
- browse_commits: describe list/get/diff scenarios
- browse_events: distinguish user vs project activity feeds
- manage_repository: explain create vs fork purposes
- list_todos: describe todo sources and filter options
- manage_todos: clarify mark_done vs mark_all_done vs restore

Follows CLAUDE.md "Agentic Tool Description Standards" - focus on
WHAT and WHEN, not HOW (no implementation details).

Addressed review comments:
- Improve error messages with format guidance (project_id examples)
- Fix URL encoding comment: spaces become '+' not '%20'
- Add .int().positive() validation to ManageTodosSchema id field
- Document fork_name/fork_path naming rationale (avoids schema conflict)

Deferred to future:
- Discriminated unions for action-specific validation (significant refactor)
- Deprecated schema simplification (needed for backward compatibility)

… feedback

TODOS INTEGRATION TESTING:
- Add todos helper methods to registry-helper.ts (listTodos, markTodoDone, etc.)
- Add Step 6.5 to data-lifecycle.test.ts for todos infrastructure testing
- Tests: list pending todos, filter by type, mark_done/restore, mark_all_done

COPILOT REVIEW FIXES:
- Document fork_name/fork_path rationale (distinct from create's name for schema)
- Clarify manage_todos response types in description (object vs success status)
- Clarify q vs search parameter distinction in BrowseProjectsSchema
- Improve handler code with explicit destructuring per action

OAUTH TEST COVERAGE:
- Add callback.test.ts for OAuth callback endpoint
- Add gitlab-device-flow.test.ts for device flow operations

Add 24 unit tests covering previously untested handlers:
- browse_namespaces: list, get, verify actions with all parameters
- browse_commits: list, get, diff actions with filters
- browse_events: user and project scoped events
- get_users: non-smart search path with filters
- list_project_members: basic and query filter operations
- list_group_iterations: iterations with state/search filters
- download_attachment: success, missing content-type, errors
- create_branch: branch creation from refs
- create_group: full parameter coverage
- manage_repository: fork edge cases, namespace resolution
- manage_todos: additional error handling paths

Coverage improvement for registry.ts:
- Statements: 67.84% -> 91.54% (+23.7%)
- Branches: 67.49% -> 82.33% (+14.8%)
- Lines: 84.12% -> 94.42% (+10.3%)