fix: Mark conversation_id as required in message schema

The conversation_id field was missing from the required array in the
message schema, making it appear optional in rendered API docs. This
confused customers into thinking the Create Conversation endpoint might
not always return a conversation ID. Added conversation_id to the
required array across all versions (2.11 already had it).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: markdennis22

descriptions/0/api.intercom.io.yaml

@@ -24664,6 +24664,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     whatsapp_message_status_list:
       type: object
       required:

descriptions/2.10/api.intercom.io.yaml

@@ -15190,6 +15190,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.12/api.intercom.io.yaml

@@ -16487,6 +16487,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.13/api.intercom.io.yaml

@@ -18190,6 +18190,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     multiple_filter_search_request:
       title: Multiple Filter Search Request
       description: Search using Intercoms Search APIs with more than one filter.

descriptions/2.14/api.intercom.io.yaml

@@ -20019,6 +20019,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     whatsapp_message_status_list:
       type: object
       required:

descriptions/2.15/api.intercom.io.yaml

@@ -20847,6 +20847,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     whatsapp_message_status_list:
       type: object
       required:

descriptions/2.7/api.intercom.io.yaml

@@ -13106,6 +13106,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.8/api.intercom.io.yaml

@@ -13131,6 +13131,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.9/api.intercom.io.yaml

@@ -14483,6 +14483,7 @@ components:
       - created_at
       - body
       - message_type
+      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf: