feat(scenario): run logs, lint/format tooling, CONTRIBUTING

- add ScenarioRunLogEntity to persist step script output to DB
- stepLogger dual-writes to NestJS logger and DB (fire-and-forget)
- add GET /scenarios/:id/run/:runId returning run, stepRuns and logs
- add POST /scenarios/:id/run/:runId/wait (polls until terminal state)
- 9 new integration tests for the two endpoints (136 total)
- add eslint with typescript-eslint and eslint-config-prettier
- add npm scripts: format, lint, lint:fix
- resolve all lint errors across src and test (no any types)
- add CONTRIBUTING.md covering dev workflow

package.json

@@ -8,6 +8,9 @@
     "start": "nest start",
     "start:dev": "nest start --watch",
     "start:prod": "node dist/main",
+    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
+    "lint": "eslint \"src/**/*.ts\" \"test/**/*.ts\"",
+    "lint:fix": "eslint --fix \"src/**/*.ts\" \"test/**/*.ts\"",
     "test": "jest",
     "test:debug": "DEBUG=test jest",
     "test:watch": "jest --watch"
@@ -50,9 +53,13 @@
     "@types/node": "^25.5.2",
     "@types/supertest": "^7.2.0",
     "debug": "^4.4.3",
+    "eslint": "^10.2.0",
+    "eslint-config-prettier": "^10.1.8",
     "jest": "^30.3.0",
+    "prettier": "^3.8.1",
     "supertest": "^7.2.2",
     "ts-jest": "^29.4.9",
-    "typescript": "^6.0.2"
+    "typescript": "^6.0.2",
+    "typescript-eslint": "^8.58.1"
   }
 }