Nenya 0.6.1

Changelog

• 53d9f6e Merge phase-010-gemini-model-registry
• 66bbcbe Merge phase-011-gemini-3-capability-rule
• 2c6c94c Merge phase-012-gemini-thinking-mapping
• adb7b02 Merge phase-013-gemini-temperature-default
• c7c9cd1 Phase 010: Update model registry and maps
• f92b62f Phase 011: Add gemini-3 capability rule
• 2a817f9 Phase 012: Add thinking config mapping for Gemini
• 29133aa Phase 013: Add temperature default for Gemini 3
• 73a55b5 Phase 014: Add function call ID forwarding for Gemini 3.5+