docs(prd-6): mark M7 complete — documentation updated with full E2E results

- Updated docs/forgejo.md E2E table with all 5 validated trigger scenarios
- Added "Webhook & Event Differences" section (12-row comparison table)
- Added 4 new Known Limitations and 5 new Troubleshooting entries
- Removed "Not Yet E2E Tested" section — all triggers validated
- PRD #6 is 100% complete (all 7 milestones done)

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

prds/6-e2e-test-forgejo-triggers.md

@@ -105,12 +105,14 @@ Systematically exercise each untested scenario on the live Forgejo instance (git
     1. `f08b1b4`: Prompt template in `src/create-prompt/index.ts` (lines 604, 794) hardcoded `quick_pull=1` (GitHub-specific) in the "Create a PR" URL. On Forgejo, this param is ignored so the compare page doesn't auto-expand the PR creation form. Forgejo uses `expand=1`. Fix: made prompt template platform-aware via `detectPlatform()`. Note: `updateForgejoCommentBody()` extracts PR URLs from comment content (`prLinkFromContent`) with priority over the URL from `update-comment-link.ts`, so the prompt template is the correct fix location.
   - **Key learning**: The PR compare URL appears in two places — the prompt template (used by Claude to write the URL into comment body) and `update-comment-link.ts` (post-execution update). Because `updateForgejoCommentBody()` prioritizes URLs found in existing content, both must use the correct platform-specific query parameter. Fix validated after merge to `main` (workflow runs from default branch for `issue_comment` events).
 
-- [ ] **M7: Update documentation with E2E results**
-  - Update `docs/forgejo.md` E2E status table with results for all 5 scenarios
-  - Move tested items from "Not Yet E2E Tested" to the validated table
-  - Document any Forgejo-specific quirks or limitations discovered
-  - Add troubleshooting entries for any issues encountered
-  - **Validation**: `docs/forgejo.md` accurately reflects the current E2E validation status
+- [x] **M7: Update documentation with E2E results**
+  - Updated `docs/forgejo.md` E2E status table with all 5 validated trigger scenarios ✓
+  - Removed "Not Yet E2E Tested" section entirely — all items validated ✓
+  - Added new "Webhook & Event Differences" section with 12-row comparison table documenting all Forgejo payload/event divergences ✓
+  - Added 4 new Known Limitations entries (dead `pull_request_review` trigger, review comments as issue comments, unreliable workflow `if:`, assignees API) ✓
+  - Added 5 new Troubleshooting entries (review reply tracking, `if:` skipping, `#` parse errors, duplicate label fires, `mock.module()` pollution) ✓
+  - Expanded "Tag Mode Verified Capabilities" from 6 to 10 bullet points ✓
+  - **Validation**: `docs/forgejo.md` accurately reflects the current E2E validation status ✓
 
 ## Dependencies