Major new features in this release:

New Features:
- Complete resource URI parameter extraction implementation
  * Extract params from templates: "user://{id}" + "user://123" → %{"id" => "123"}
  * Multiple parameter support: "user://{id}/posts/{post_id}"
  * Proper regex escaping and pattern matching
  * Full test coverage with 11 new tests
  * Resolves long-standing TODO in codebase

- Optional PromEx plugin for Prometheus monitoring
  * 10 production-ready metrics (counters + histograms)
  * Monitors: requests, tools, resources, prompts, authentication
  * Optimized histogram buckets per operation type
  * Low cardinality design with string normalization
  * PromQL query examples and alert templates
  * Conditional compilation (zero impact if not used)
  * 12 comprehensive tests

Test Coverage:
- 33 new tests added across the board
- Resource tests: 11 new (URI extraction, actual URIs, edge cases)
- Prompt tests: 4 new (message formatting, optional args)
- Tool tests: 6 new (enum validation, defaults, handlers)
- PromEx tests: 12 new (structure, metrics, config)
- Total: 229 tests, all passing (up from 196)

Documentation:
- Added comprehensive Prometheus Metrics section to README
- 190+ lines of PromEx plugin documentation
- PromQL query cookbook with 4 example queries
- Alert rule templates for production monitoring
- Complete metric reference with tags and descriptions

Bug Fixes:
- Fixed version consistency across all files
- Removed crash dump and package artifacts (5+ MB cleanup)
- Updated test badge to reflect actual count

Backward Compatibility:
- Fully backward compatible
- No breaking changes
- All existing functionality preserved
- Optional features don't affect existing users

Dependencies:
- Added prom_ex ~> 1.11 as optional dependency
- No impact unless explicitly installed by users

Migration:
No migration needed - drop-in replacement for 0.4.x versions.
Simply update your dependency version to ~> 0.5.0