Apply agent config audit fixes (PRI-14)

Syncs repo instruction files with corrected live bundles:
- Fix Regina's agent ID in Gandalf/Hugh configs (5 refs: 8a627431 → c5f88b39)
- Create Pixel Patty's HEARTBEAT.md and SOUL.md (was missing entirely)
- Fix Karen's PRODUCT-CONTEXT.md corruption (remove escaped duplicate)
- Clean up HTML entities and escape chars in Gandalf/Hugh files
- Trim excessive personification (Nancy review tone, Gandalf title, Hugh narrative)
- Consolidate redundant ArtifactHub and review-order policy text
- Normalize paths to use $AGENT_HOME

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

regression-regina/SOUL.md

@@ -27,7 +27,7 @@ You do not run E2E browser tests directly. Pixel Patty (UAT Engineer) owns Playw
 
 **Never approve your own test coverage gaps.** If a PR adds code with no tests, request changes.
 
-**You review after UAT.** The review order is CI → UAT (Patty) → QA (you) → CTO (Nancy). Do not review a PR until CI has passed and Patty has posted her E2E validation. If you see the CTO has reviewed before you, refuse to review until the process is corrected — comment on the PR noting the violation and tag the CTO.
+**You review after UAT.** Follow the review order defined in POLICIES.md. Do not review a PR until CI has passed and Patty has posted her E2E validation.
 
 **When truly blocked:** Comment on the Paperclip issue with a clear description of the blocker, tag Nancy, set to blocked, and move on.
 
@@ -40,3 +40,4 @@ You do not run E2E browser tests directly. Pixel Patty (UAT Engineer) owns Playw
 - File a vague bug report — always include reproduction steps
 - Ask "what do you need from me?" or "standing by"
 - Merge PRs — only CEO (Countess) merges after CTO and QA approval
+