Implement file storage layer with local provider, upload/download API, tests

- StorageProvider interface with LocalProvider (S3 placeholder)
- File table with entity_type/entity_id references, content type, path
- POST /v1/files (multipart upload), GET /v1/files (list by entity),
  GET /v1/files/:id (metadata), GET /v1/files/serve/* (content),
  DELETE /v1/files/:id
- member_identifier drops base64 columns, uses file_id FKs
- File validation: type whitelist, size limits, per-entity max
- Fastify storage plugin injects provider into app
- 6 API tests for upload, list, get, delete, validation
- Test runner kills stale port before starting backend

bun.lock

@@ -59,6 +59,7 @@
       "dependencies": {
         "@fastify/cors": "^10",
         "@fastify/jwt": "^9",
+        "@fastify/multipart": "^9.4.0",
         "@fastify/rate-limit": "^10.3.0",
         "@forte/shared": "workspace:*",
         "bcrypt": "^6",
@@ -209,8 +210,12 @@
 
     "@fastify/ajv-compiler": ["@fastify/ajv-compiler@4.0.5", "", { "dependencies": { "ajv": "^8.12.0", "ajv-formats": "^3.0.1", "fast-uri": "^3.0.0" } }, "sha512-KoWKW+MhvfTRWL4qrhUwAAZoaChluo0m0vbiJlGMt2GXvL4LVPQEjt8kSpHI3IBq5Rez8fg+XeH3cneztq+C7A=="],
 
+    "@fastify/busboy": ["@fastify/busboy@3.2.0", "", {}, "sha512-m9FVDXU3GT2ITSe0UaMA5rU3QkfC/UXtCU8y0gSN/GugTqtVldOBWIB5V6V3sbmenVZUIpU6f+mPEO2+m5iTaA=="],
+
     "@fastify/cors": ["@fastify/cors@10.1.0", "", { "dependencies": { "fastify-plugin": "^5.0.0", "mnemonist": "0.40.0" } }, "sha512-MZyBCBJtII60CU9Xme/iE4aEy8G7QpzGR8zkdXZkDFt7ElEMachbE61tfhAG/bvSaULlqlf0huMT12T7iqEmdQ=="],
 
+    "@fastify/deepmerge": ["@fastify/deepmerge@3.2.1", "", {}, "sha512-N5Oqvltoa2r9z1tbx4xjky0oRR60v+T47Ic4J1ukoVQcptLOrIdRnCSdTGmOmajZuHVKlTnfcmrjyqsGEW1ztA=="],
+
     "@fastify/error": ["@fastify/error@4.2.0", "", {}, "sha512-RSo3sVDXfHskiBZKBPRgnQTtIqpi/7zhJOEmAxCiBcM7d0uwdGdxLlsCaLzGs8v8NnxIRlfG0N51p5yFaOentQ=="],
 
     "@fastify/fast-json-stringify-compiler": ["@fastify/fast-json-stringify-compiler@5.0.3", "", { "dependencies": { "fast-json-stringify": "^6.0.0" } }, "sha512-uik7yYHkLr6fxd8hJSZ8c+xF4WafPK+XzneQDPU+D10r5X19GW8lJcom2YijX2+qtFF1ENJlHXKFM9ouXNJYgQ=="],
@@ -221,6 +226,8 @@
 
     "@fastify/merge-json-schemas": ["@fastify/merge-json-schemas@0.2.1", "", { "dependencies": { "dequal": "^2.0.3" } }, "sha512-OA3KGBCy6KtIvLf8DINC5880o5iBlDX4SxzLQS8HorJAbqluzLRn80UXU0bxZn7UOFhFgpRJDasfwn9nG4FG4A=="],
 
+    "@fastify/multipart": ["@fastify/multipart@9.4.0", "", { "dependencies": { "@fastify/busboy": "^3.0.0", "@fastify/deepmerge": "^3.0.0", "@fastify/error": "^4.0.0", "fastify-plugin": "^5.0.0", "secure-json-parse": "^4.0.0" } }, "sha512-Z404bzZeLSXTBmp/trCBuoVFX28pM7rhv849Q5TsbTFZHuk1lc4QjQITTPK92DKVpXmNtJXeHSSc7GYvqFpxAQ=="],
+
     "@fastify/proxy-addr": ["@fastify/proxy-addr@5.1.0", "", { "dependencies": { "@fastify/forwarded": "^3.0.0", "ipaddr.js": "^2.1.0" } }, "sha512-INS+6gh91cLUjB+PVHfu1UqcB76Sqtpyp7bnL+FYojhjygvOPA9ctiD/JDKsyD9Xgu4hUhCSJBPig/w7duNajw=="],
 
     "@fastify/rate-limit": ["@fastify/rate-limit@10.3.0", "", { "dependencies": { "@lukeed/ms": "^2.0.2", "fastify-plugin": "^5.0.0", "toad-cache": "^3.7.0" } }, "sha512-eIGkG9XKQs0nyynatApA3EVrojHOuq4l6fhB4eeCk4PIOeadvOJz9/4w3vGI44Go17uaXOWEcPkaD8kuKm7g6Q=="],