[Kaliratech]

Summary

• keep the fork's build and test workflow and add a real manual trigger
• update validation to Node 22 with dependency caching and bounded concurrency
• remove npm and MCP Registry publication workflows because this fork does not own the upstream package or registry identity
• serialise Vitest files because parallel worker teardown races the signal-resilience subprocess group

Verification

• npm run build: pass
• npm test: 23 files, 258 tests, 0 failures
• tests/signal-resilience.test.ts passes alone
• the full suite passes with file-level serialisation
• repository Actions enabled; workflow registry now active

The branch is current with upstream main before this change.