1.0.0-beta6

New submodule: mcp_tools_remote_media (community contribution by guillaumeg)
- FetchRemoteImage tool: download images from URLs, create managed media entities
- Supports JPEG, PNG, GIF, WebP (SVG excluded for security)
- SSRF protection: blocks private/reserved IP ranges
- Extension blocklist: prevents .php, .phar, .exe and 15 other dangerous extensions
- Defence-in-depth MIME validation (Content-Type header + finfo content sniffing)
- Delegates media creation to existing MediaService (no code duplication)
- AbstractRemoteFileService base class with fetchAndCreate() template method
  for future document/audio/video support
- 24 unit tests covering validation, SSRF, extension blocklist, buildFilename

Total: 223 tools across 35 submodules.