Nenya 0.7.0

Changelog

• 3fc552b Merge phase-010: Add agent metadata aggregation helpers
• b271473 Merge phase-010: add 16 new models
• 0e39bf8 Merge phase-011: Enrich /v1/models agent entries
• a43b748 Merge phase-011: correct GLM pricing
• 659bb73 Merge phase-012: Add description field to AgentConfig
• e31f702 Merge phase-012: cleanup trailing zero and redundant fields
• 2c4e10f feat(cache): add anthropic prompt caching - system + tools + messages
• 778ce32 feat(cache): track anthropic cache creation tokens in usage stats
• 7dd698c feat(config): add description field to AgentConfig
• cfc6122 feat(proxy): enrich /v1/models agent entries with aggregate metadata
• 9aeb5ad feat(registry): add 16 new models and fix claude-sonnet-4-6 thinking levels
• f922e15 feat(routing): add agent metadata aggregation helpers
• 0390019 feat(routing): add per-model reasoning_effort configuration
• ce09a70 fix(cache): harden anthropic cache_control for production readiness
• e189c2f fix(registry): align opus-4-6 levels and grok-4.3 ZeroAllowed with reference
• de33ebc fix(registry): correct all GLM pricing to match Z.AI official rates
• f5625a9 style(registry): cleanup trailing zero, redundant ZeroAllowed fields
• 9b7df8c test(proxy): add tests for agent metadata aggregation