feat: add version info

Signed-off-by: allanice001 <allanice001@gmail.com>

docs/swagger.yaml

@@ -476,6 +476,42 @@ definitions:
         example: ok
         type: string
     type: object
+  handlers.VersionResponse:
+    properties:
+      built:
+        example: "2025-11-08T12:34:56Z"
+        type: string
+      builtBy:
+        example: ci
+        type: string
+      commit:
+        example: a1b2c3d
+        type: string
+      commitTime:
+        example: "2025-11-08T12:31:00Z"
+        type: string
+      go:
+        example: go1.23.3
+        type: string
+      goArch:
+        example: amd64
+        type: string
+      goOS:
+        example: linux
+        type: string
+      modified:
+        example: false
+        type: boolean
+      revision:
+        example: a1b2c3d4e5f6abcdef
+        type: string
+      vcs:
+        example: git
+        type: string
+      version:
+        example: 1.4.2
+        type: string
+    type: object
   handlers.createUserKeyRequest:
     properties:
       expires_in_hours:
@@ -3587,6 +3623,22 @@ paths:
       summary: Update node taint (org scoped)
       tags:
       - Taints
+  /version:
+    get:
+      consumes:
+      - application/json
+      description: Returns build/runtime metadata for the running service.
+      operationId: Version                 // operationId
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/handlers.VersionResponse'
+      summary: Service version information
+      tags:
+      - Meta
 schemes:
 - http
 - https