add diagnostic endpoint

server/router/docs/swagger.yaml

@@ -233,9 +233,87 @@ definitions:
       status:
         type: string
     type: object
+  models.DailyCreationDiagnosticsResponse:
+    properties:
+      status:
+        type: string
+      date:
+        type: string
+      table:
+        type: string
+      total_rows:
+        type: integer
+      missing_creation_count:
+        type: integer
+      missing_creation_pct:
+        type: number
+      missing_by_vcenter:
+        items:
+          $ref: '#/definitions/models.DailyCreationMissingByVcenter'
+        type: array
+      samples:
+        items:
+          $ref: '#/definitions/models.DailyCreationMissingSample'
+        type: array
+    type: object
+  models.DailyCreationMissingByVcenter:
+    properties:
+      vcenter:
+        type: string
+      missing_count:
+        type: integer
+    type: object
+  models.DailyCreationMissingSample:
+    properties:
+      vcenter:
+        type: string
+      vm_id:
+        type: string
+      vm_uuid:
+        type: string
+      name:
+        type: string
+      samples_present:
+        type: integer
+      avg_is_present:
+        type: number
+      snapshot_time:
+        type: integer
+    type: object
 info:
   contact: {}
 paths:
+  /api/diagnostics/daily-creation:
+    get:
+      description: Returns counts of daily summary rows missing CreationTime and sample rows for the given date.
+      parameters:
+      - description: Daily date (YYYY-MM-DD)
+        in: query
+        name: date
+        required: true
+        type: string
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Diagnostics result
+          schema:
+            $ref: '#/definitions/models.DailyCreationDiagnosticsResponse'
+        "400":
+          description: Invalid request
+          schema:
+            $ref: '#/definitions/models.ErrorResponse'
+        "404":
+          description: Summary not found
+          schema:
+            $ref: '#/definitions/models.ErrorResponse'
+        "500":
+          description: Server error
+          schema:
+            $ref: '#/definitions/models.ErrorResponse'
+      summary: Daily summary CreationTime diagnostics
+      tags:
+      - diagnostics
   /:
     get:
       description: Renders the main UI page.