Remove request_heartbeat param from all tool functions (bookstack-mcp-402)

Fix test assertions for list content and MCP resources

refactor: extract duplicated HTTP error handling into shared helper

Apply 4 structural fixes: logging, regex pre-compilation, gitignore cleanup, and function scope

chore: remove dead test scripts and historical markdown docs

Disable SQL injection checks for wiki content (bookstack-mcp-6rh)

Add remaining bug fixes and test files

Fix P0/P1 bugs and add comprehensive test coverage

Add comprehensive unit tests for chapter and bookshelf CRUD operations

Add comprehensive unit tests for validators and HTTP error handling

Speed up tests and container builds

Enforce remote image MIME allowlist

Fix targeted cache invalidation

Block SSRF targets in URL image uploads

Harden image publishing and container healthchecks