perf(catalog): record default catalog digests at build time (#4041)

Every `doctor`, `mcp doctor` and MCP server that reports or compares its
catalog identity rebuilt all advertised JSON Schemas and canonicalized
them to compute the default digests, about 200 ms of CPU per process.
The default (full input and output schema) catalog is a deterministic
function of the compiled contracts and pinned schema converter, so
compilation now records it once into dist and the runtime reuses it.
Compact and output-schema-off identities, and source runs, still compute
their digests on first use.

Refs #3813

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -291,8 +291,8 @@
     "verify:solidity:metadata": "npm run build:cached && node scripts/verify-solidity-metadata.mjs",
     "verify:recorded:crash": "npm run build:cached && node scripts/verify-recorded-crash.mjs",
     "mcp-catalog:check:built": "node scripts/generate-mcp-tool-catalog.mjs --check",
-    "compile": "node scripts/clean-build-output.mjs && tsc -p tsconfig.build.json && node scripts/bundle-runtime.mjs",
-    "compile:termux": "node scripts/clean-build-output.mjs && node --max-old-space-size=3072 node_modules/typescript-termux/lib/tsc.js -p tsconfig.build.json && node scripts/bundle-runtime.mjs",
+    "compile": "node scripts/clean-build-output.mjs && tsc -p tsconfig.build.json && node scripts/record-catalog-digests.mjs && node scripts/bundle-runtime.mjs",
+    "compile:termux": "node scripts/clean-build-output.mjs && node --max-old-space-size=3072 node_modules/typescript-termux/lib/tsc.js -p tsconfig.build.json && node scripts/record-catalog-digests.mjs && node scripts/bundle-runtime.mjs",
     "artifacts:mcp-catalog": "node scripts/generate-mcp-tool-catalog.mjs",
     "artifacts:skills": "node scripts/generate-skill-metadata.mjs",
     "artifacts:product-catalog": "node scripts/generate-product-catalog.mjs",