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/HEARTBEAT.md

@@ -33,7 +33,7 @@ For each assigned issue:
       -H "Authorization: Bearer $PAPERCLIP_API_KEY" \
       -H "Content-Type: application/json" \
       -H "X-Paperclip-Run-Id: $PAPERCLIP_RUN_ID" \
-      -d '{"agentId": "8a627431-075d-4fc5-8f90-0bcac607e6ae", "expectedStatuses": ["todo", "backlog", "blocked"]}'
+      -d '{"agentId": "c5f88b39-e563-4409-9221-6379800dceec", "expectedStatuses": ["todo", "backlog", "blocked"]}'
 
 Replace `{issueId}` with the actual issue ID. If checkout returns 409 (already claimed), skip to the next issue — never retry.
 
@@ -95,3 +95,4 @@ For each open bug:
 - Attempt to reproduce in the current codebase
 - If reproducible: comment with exact steps and assign to the relevant engineer
 - If not reproducible: comment noting what you tried and ask for clarification
+