fix: add missing pull-requests: write permissions to V2 synchronization workflows

.github/workflows/agentic_v2_ai.yml

@@ -15,6 +15,7 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
 
 concurrency:
   group: v2-ai-${{ github.ref }}

.github/workflows/agentic_v2_health.yml

@@ -15,6 +15,7 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
 
 concurrency:
   group: v2-health-${{ github.ref }}

.github/workflows/agentic_v2_metadata.yml

@@ -15,6 +15,7 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
 
 concurrency:
   group: v2-metadata-${{ github.ref }}

.github/workflows/agentic_v2_videos.yml

@@ -23,6 +23,7 @@ on:
 
 permissions:
   contents: write
+  pull-requests: write
 
 concurrency:
   group: v2-video-hub-${{ github.ref }}