Add API documentation for inbox, agent, and team summary report (#13409)

- Add API documentation for inbox, agent, and team summary report
endpoints
- These endpoints return conversation statistics grouped by
inbox/agent/team for a given date range

Endpoints documented:
GET /api/v2/accounts/{account_id}/summary_reports/inbox │ Conversation
stats grouped by inbox │
GET /api/v2/accounts/{account_id}/summary_reports/agent │ Conversation
stats grouped by agent │
GET /api/v2/accounts/{account_id}/summary_reports/team │ Conversation
stats grouped by team │

Query parameters (all endpoints):
- since - Start timestamp (Unix)
- until - End timestamp (Unix)
- business_hours - Calculate metrics using business hours only

Response fields:
- id - Inbox/Agent/Team ID
- conversations_count - Total conversations in date range
- resolved_conversations_count - Resolved conversations in date range
- avg_resolution_time - Average resolution time (seconds)
- avg_first_response_time - Average first response time (seconds)
- avg_reply_time - Average reply time (seconds)

swagger/paths/application/reports/agent_summary.yml

@@ -0,0 +1,23 @@
+tags:
+  - Reports
+operationId: get-agent-summary-report
+summary: Get conversation statistics grouped by agent
+security:
+  - userApiKey: []
+description: |
+  Get conversation statistics grouped by agent for a given date range.
+  Returns metrics for each agent including conversation counts, resolution counts,
+  average first response time, average resolution time, and average reply time.
+responses:
+  '200':
+    description: Success
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/agent_summary'
+  '403':
+    description: Access denied
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/bad_request_error'

swagger/paths/application/reports/inbox_summary.yml

@@ -0,0 +1,23 @@
+tags:
+  - Reports
+operationId: get-inbox-summary-report
+summary: Get conversation statistics grouped by inbox
+security:
+  - userApiKey: []
+description: |
+  Get conversation statistics grouped by inbox for a given date range.
+  Returns metrics for each inbox including conversation counts, resolution counts,
+  average first response time, average resolution time, and average reply time.
+responses:
+  '200':
+    description: Success
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/inbox_summary'
+  '403':
+    description: Access denied
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/bad_request_error'

swagger/paths/application/reports/team_summary.yml

@@ -0,0 +1,23 @@
+tags:
+  - Reports
+operationId: get-team-summary-report
+summary: Get conversation statistics grouped by team
+security:
+  - userApiKey: []
+description: |
+  Get conversation statistics grouped by team for a given date range.
+  Returns metrics for each team including conversation counts, resolution counts,
+  average first response time, average resolution time, and average reply time.
+responses:
+  '200':
+    description: Success
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/team_summary'
+  '403':
+    description: Access denied
+    content:
+      application/json:
+        schema:
+          $ref: '#/components/schemas/bad_request_error'