chore: Improve bulk metrics endpoint (#3213)

## About the changes
This adds support for connectVia the way we intend to use it and start
now supports also a string

src/lib/openapi/spec/bulk-registration-schema.ts

@@ -1,4 +1,5 @@
 import { FromSchema } from 'json-schema-to-ts';
+import { dateSchema } from './date-schema';
 
 export const bulkRegistrationSchema = {
     $id: '#/components/schemas/bulkRegistrationSchema',
@@ -8,7 +9,16 @@ export const bulkRegistrationSchema = {
         connectVia: {
             type: 'array',
             items: {
-                type: 'string',
+                type: 'object',
+                required: ['appName', 'instanceId'],
+                properties: {
+                    appName: {
+                        type: 'string',
+                    },
+                    instanceId: {
+                        type: 'string',
+                    },
+                },
             },
         },
         appName: {
@@ -24,7 +34,7 @@ export const bulkRegistrationSchema = {
             type: 'number',
         },
         started: {
-            type: 'number',
+            $ref: '#/components/schemas/dateSchema',
         },
         strategies: {
             type: 'array',
@@ -37,7 +47,9 @@ export const bulkRegistrationSchema = {
         },
     },
     components: {
-        schemas: {},
+        schemas: {
+            dateSchema,
+        },
     },
 } as const;
 

src/test/e2e/api/openapi/__snapshots__/openapi.e2e.test.ts.snap

@@ -352,7 +352,19 @@ exports[`should serve the OpenAPI spec 1`] = `
           },
           "connectVia": {
             "items": {
-              "type": "string",
+              "properties": {
+                "appName": {
+                  "type": "string",
+                },
+                "instanceId": {
+                  "type": "string",
+                },
+              },
+              "required": [
+                "appName",
+                "instanceId",
+              ],
+              "type": "object",
             },
             "type": "array",
           },
@@ -369,7 +381,7 @@ exports[`should serve the OpenAPI spec 1`] = `
             "type": "string",
           },
           "started": {
-            "type": "number",
+            "$ref": "#/components/schemas/dateSchema",
           },
           "strategies": {
             "items": {