fix: test_mcp_server 12 failures resolved — model fields, registry API, GPU label

fix: sync test_mcp_server imports with current server/models API

feat: V6.0 — TokenDance Master-Mirror storage, JCR Safety Gate (INV-15), AITER ROCm config. 15/15 PASS

fix: S-3 rotate_kv_quantization 4D indexing, S-13 speculative acceptance rate, Gradio real pipeline data

feat: APOHARA: Context Forge V5 — synthesis + rebrand complete