Add Swagger docs at /docs and /openapi.json with split OpenAPI spec

Made-with: Cursor

backend/openapi/path-items/health.yaml

@@ -0,0 +1,14 @@
+get:
+  tags: [Public]
+  summary: Health check
+  responses:
+    "200":
+      description: OK
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              status:
+                type: string
+                example: ok