Adds benchmark_plans.py script, plans_bench API router, PlansBenchTab Vue
component, and registers /api/plans-bench in api.py. Also extends models
registry (cf-text catalog integration), cforch client, LlmEvalTab, and
ModelsView with cf-orch fleet support. Wires Planning mode into BenchmarkView.
- GET /api/models/lookup now returns compatible: bool and warning: str|null
- compatible=false + warning when pipeline_tag is absent (no task tag on HF)
or present but not in the supported adapter map
- Warning message names the unsupported pipeline_tag and lists supported types
- ModelsView: yellow compat-warning banner below preview description;
Add button relabels to "Add anyway" with muted styling when incompatible
- test_models: accept 405 for path-traversal DELETE tests (StaticFiles mount
returns 405 for non-GET methods when web/dist exists)
