chore: remove Samuel, reduce per-heartbeat token load

- Remove Samuel Stinkpost (terminated) from all files and delete marketing/samuel/
- Update PEM listing in OPERATIONS.md to the 4 role-based keys
- POLICIES.md and TOOLS.md are now conditional reads (only when agents have work to do), not loaded on every heartbeat
- Split product/SOUL.md: core identity stays in SOUL.md, reference material (plugin portfolio, competitive landscape, evaluation framework, spec template) moved to PRODUCT-CONTEXT.md
- CLAUDE.md improvements: add OPERATIONS.md/POLICIES.md/TOOLS.md references, fix adapter list, add PR workflow, document opencode.json purpose

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

github-apps/README.md

@@ -22,7 +22,6 @@ to enforce the PR workflow at the GitHub level.
 | Hugh Hackman (VP devops) | engineer | `privilegedescalation-engineer` |
 | Gandalf the Greybeard | engineer | `privilegedescalation-engineer` |
 | Regression Regina (QA) | qa | `privilegedescalation-qa` |
-| Samuel Stinkpost | engineer | `privilegedescalation-engineer` |
 
 ## PEM Location