chore: add jobs:worker script and knip dead-code check to CI

Add 'knip' and 'jobs:worker' scripts to package.json. Wire knip into CI check job after tests. Remove redundant jobs-worker entry from knip.json (auto-detected).

package.json

@@ -13,6 +13,8 @@
 		"lint": "biome check .",
 		"biome:lint": "biome check .",
 		"format": "biome format --write .",
+		"knip": "knip --include files,dependencies,devDependencies,unlisted,binaries",
+		"jobs:worker": "tsx scripts/jobs-worker.ts",
 		"test": "vitest",
 		"typecheck": "tsc --noEmit",
 		"db:generate": "drizzle-kit generate",