build: add canonical product catalog and docs drift checks

Derive package, tool-family, provider, setup-client, schema-version, and CLI facts from the runtime contract sources into a deterministic checked-in catalog.

Add non-mutating generated-file checks, exact TypeDoc regenerate-and-compare validation, caller-visible documentation fact checks, and CI enforcement through docs:check.

Cover command-router parity, source-derived catalog values, deliberate documentation drift, and stale generated artifacts while preserving runtime behavior.

.github/workflows/ci.yml

@@ -141,4 +141,4 @@ jobs:
           node-version-file: .nvmrc
           cache: npm
       - run: npm ci
-      - run: npm run docs:generate
+      - run: npm run docs:check