* feat: implement discovery caching with state-based approach
- Add DiscoveryState class to encapsulate discovered MCP capabilities
- Add exportDiscoveryState and importDiscoveryState methods to Registry
- Modify Discoverer to return DiscoveryState instead of void
- Create CachedDiscoverer decorator for caching discovery results
- Add importDiscoveryState method to ReferenceRegistryInterface
- Update ServerBuilder to use caching with withCache() method
- Update tests to work with new state-based approach
- Add example demonstrating cached discovery functionality
- Add PSR-16 SimpleCache and Symfony Cache dependencies
* docs: add comprehensive discovery caching documentation
- Add detailed documentation explaining discovery caching architecture
- Include usage examples for different cache implementations
- Document performance benefits and best practices
- Add troubleshooting guide and migration instructions
- Include complete API reference for all caching components
- Fix PHPStan issues by regenerating baseline
- Apply PHP CS Fixer formatting to all new files
* refactor: address reviewer feedback and clean up discovery caching
- Make DiscoveryState class final
- Cache DiscoveryState objects directly instead of arrays (no serialization needed)
- Rename exportDiscoveryState/importDiscoveryState to getDiscoveryState/setDiscoveryState
- Add getDiscoveryState method to ReferenceRegistryInterface
- Remove TTL parameter from CachedDiscoverer (no expiration by default)
- Remove unused methods from DiscoveryState (toArray, fromArray, merge)
- Simplify ServerBuilder to handle decoration internally
- Make Discoverer.applyDiscoveryState() internal (no longer public API)
- Simplify documentation to focus on user perspective
- Remove unnecessary development comments
- Update all tests to work with new architecture
- All tests pass, PHPStan clean, code formatting applied
* refactor: clean up comments and formatting in server.php example
* refactor: improve code formatting and consistency in discovery classes and example server
* Fix method names in cached discovery example
- Change withServerInfo() to setServerInfo()
- Change withDiscovery() to setDiscovery()
- Change withLogger() to setLogger()
- Fixes PHPStan static analysis errors
* refactor: update method names in ServerBuilder for consistency
- Change withCache() to setCache() in ServerBuilder
- Update example and documentation to reflect method name changes
- Ensure consistency across caching implementation in examples and documentation
* refactor: reorganize examples and fix PHPStan baseline
- Move cached discovery example from examples/10 to examples/09
- Update composer.json autoload-dev namespace mapping
- Fix PHPStan baseline by removing invalid entries for non-existent files
- Update server.php to follow proper example pattern with logging and lifecycle
* fix: correct formatting in server.php
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