chore: add id-token write permission for claude-code-action workflows

The claude-code-action requires id-token: write permission for OIDC authentication.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Generated-By: Claude Code (cli/claude-opus-4-5=100%)
Claude-Steers: 3
Claude-Permission-Prompts: 3
Claude-Escapes: 0

.github/workflows/claude-dedupe-issues.yml

@@ -17,6 +17,7 @@ jobs:
     permissions:
       contents: read
       issues: write
+      id-token: write
 
     steps:
       - name: Checkout repository

.github/workflows/claude-issue-triage.yml

@@ -11,6 +11,7 @@ jobs:
     permissions:
       contents: read
       issues: write
+      id-token: write
 
     steps:
       - name: Checkout repository

.github/workflows/oncall-triage.yml

@@ -16,6 +16,7 @@ jobs:
     permissions:
       contents: read
       issues: write
+      id-token: write
 
     steps:
       - name: Checkout repository