feat(prd-5): add dedicated claude-bot user for Forgejo

- Add bot_email action input for custom git commit email on Forgejo
- Update claude.yml to use CLAUDE_BOT_TOKEN with bot_id/bot_name/bot_email
- Update git-config.ts to use provided email over noreply format
- Add "Dedicated Bot User" setup guide to docs/forgejo.md
- Update CLAUDE.md with bot identity documentation

Infrastructure (done outside code):
- claude-bot user created (ID 48, non-admin, with avatar)
- Claude team with write access in all 12 orgs
- CLAUDE_BOT_TOKEN org-level secret in all 12 orgs

Progress: ~85% complete - pending E2E validation after merge

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/forgejo.md

@@ -43,9 +43,9 @@ jobs:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           platform: "forgejo"
           github_token: ${{ secrets.CLAUDE_BOT_TOKEN }}
-          bot_id: "YOUR_BOT_ID" # Replace with your bot's Forgejo user ID (see step 5 below)
+          bot_id: "48" # Your bot user's Forgejo ID
           bot_name: "claude-bot"
-          bot_email: "claude@yourdomain.com" # Must match the bot user's registered email
+          bot_email: "claude@wxs.ro"
 ```
 
 ### 3. Agent Mode (Automation)
@@ -71,9 +71,9 @@ jobs:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           platform: "forgejo"
           github_token: ${{ secrets.CLAUDE_BOT_TOKEN }}
-          bot_id: "YOUR_BOT_ID" # Replace with your bot's Forgejo user ID
+          bot_id: "48"
           bot_name: "claude-bot"
-          bot_email: "claude@yourdomain.com"
+          bot_email: "claude@wxs.ro"
 ```
 
 ## Platform Detection
@@ -198,7 +198,7 @@ curl -s "https://your-forgejo-instance/api/v1/users/claude-bot" | jq '.id'
     anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
     platform: "forgejo"
     github_token: ${{ secrets.CLAUDE_BOT_TOKEN }}
-    bot_id: "YOUR_BOT_ID" # Replace with the ID from step 5
+    bot_id: "48" # From step 5
     bot_name: "claude-bot"
     bot_email: "claude@yourdomain.com" # Must match the bot user's registered email
 ```