docs(api): sync openapi.json with the runtime schema; document GET /v1/tools/search and GET /v1/nsql/context (#2457) * docs(api): sync openapi.json with the runtime schema; document GET /v1/tools/search and GET /v1/nsql/context Copies spiceai/spiceai .schema/openapi.json at eb5d4cb8 to website/public/openapi.json, keeping the docs-side Apache-2.0 license block. Adds POST /v1/decisions, GET /v1/nsql/context, and GET /v1/tools/search to the spec, so the Generate API Docs workflow regenerates website/docs/api/HTTP/ with their pages. Documents GET /v1/tools/search on the Tool Registry page and GET /v1/nsql/context on the API overview, in vNext, 2.4.x, and 2.3.x, where both endpoints ship. * docs(api): define NamespacePath and CompoundType so API page generation resolves every reference; regenerate HTTP API pages * docs(api): describe an Iceberg namespace as the array of strings the runtime returns * chore: update API docs * docs(api): mark the Accept header of GET /v1/nsql/context optional; the handler defaults to Markdown * chore: update API docs --------- Co-authored-by: Emma Spice <emma@EmmasMacStudio.localdomain> Co-authored-by: Spice Schema Bot <schema-bot@spice.ai>