Make from and into required on merge_contacts_request (#582)

The merge endpoint (POST /contacts/merge) resolves from/into via find_user
and cannot succeed without both, so they are de-facto required. Declare them
in the schema across all supported API versions to match runtime behavior.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: marcmlc

descriptions/0/api.intercom.io.yaml

@@ -34619,6 +34619,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.10/api.intercom.io.yaml

@@ -15214,6 +15214,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.11/api.intercom.io.yaml

@@ -16554,6 +16554,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.12/api.intercom.io.yaml

@@ -16618,6 +16618,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.13/api.intercom.io.yaml

@@ -18227,6 +18227,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.14/api.intercom.io.yaml

@@ -20535,6 +20535,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.15/api.intercom.io.yaml

@@ -21484,6 +21484,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.7/api.intercom.io.yaml

@@ -13117,6 +13117,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.8/api.intercom.io.yaml

@@ -13142,6 +13142,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string

descriptions/2.9/api.intercom.io.yaml

@@ -14494,6 +14494,9 @@ components:
       description: Merge contact data.
       type: object
       title: Merge contact data
+      required:
+      - from
+      - into
       properties:
         from:
           type: string