perf(worker): cache request runtime

[07prajwal2000]

Summary

• Compile route validators once at artifact load (compiledRuntime.ts), cached on CompiledRoute; request path resolves them from cache instead of re-parsing the schema up to 3x per request.
• HttpClient now shares one module-level Axios instance instead of a new Axios() per request; removed native() escape hatch (also stripped from the two JS-editor global typings that exposed it to user code).
• dayjs.extend(dayjsUtc) runs once at module load instead of per request; header lookups normalize into a Map once per request instead of scanning all headers per getHeader() call.
• Compiled supervisor no longer calls initializeRedis()/initializePubSub() — no compiled request path reads Redis; shutdown uses closeNats() instead of closePubSub().

Closes #192.

Test plan

• bun test apps/server/src/modules/requestRouter/tests/dispatch.spec.ts packages/lib/tests/parser.spec.ts — 9 pass, new test asserts the same httpClient instance is reused across two executeRouteInternal calls and header lookup is case-insensitive.
• bun run --cwd apps/server lint / bun run --cwd packages/lib lint — clean.