PR-004A: Mission Import API — MVP-0 First Field Upload

- POST /api/v1/missions/import — multipart upload with video
- GET /api/v1/missions/:id — retrieve mission
- GET /api/v1/missions — list active missions
- Express + multer for file handling
- Uses application layer handlers (PR-002.5)
- In-memory repositories (swap for PostgreSQL in PR-003B)

Acceptance Tests (5/5 passing):
✅ Import mission with video
✅ Reject upload without video
✅ Retrieve mission by ID
✅ 404 for non-existent mission
✅ Health check

MVP-0 Definition of Done:
✅ Phone → Upload → Store → Retrieve
✅ No AI required
✅ First real artifact produced

Next: PR-005A — Minimal Mission Import UI

packages/api/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "@landvex/api",
+  "version": "0.1.0",
+  "description": "Mission Import API for LandveX Intelligence Lab",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "dev": "ts-node src/index.ts"
+  },
+  "dependencies": {
+    "@landvex/domain": "file:../domain",
+    "@landvex/infrastructure": "file:../infrastructure",
+    "@landvex/application": "file:../application",
+    "express": "^4.18.2",
+    "multer": "^1.4.5-lts.1",
+    "cors": "^2.8.5",
+    "helmet": "^7.1.0"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.21",
+    "@types/multer": "^1.4.11",
+    "@types/cors": "^2.8.17",
+    "@types/jest": "^29.5.0",
+    "@types/node": "^20.0.0",
+    "jest": "^29.5.0",
+    "ts-jest": "^29.1.0",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.3.0",
+    "supertest": "^6.3.3",
+    "@types/supertest": "^6.0.2"
+  }
+}