Merge upstream v2.67.0 with fork customizations preserved

Synced 79 commits from EveryInc/compound-engineering-plugin upstream while
preserving fork-specific customizations (Python/FastAPI pivot, Zoominfo-internal
review agents, deploy-wiring operational lessons, custom personas).

## Triage decisions (15 conflicts resolved)

Keep deleted (7) -- fork already removed these in prior cleanups:
- agents/design/{design-implementation-reviewer,design-iterator,figma-design-sync}
  (no fork successor; backend-Python focus doesn't need UI/Figma agents)
- agents/docs/ankane-readme-writer (replaced by python-package-readme-writer)
- agents/review/{data-migration-expert,performance-oracle,security-sentinel}
  (replaced by *-reviewer naming convention: data-migrations-reviewer,
  performance-reviewer, security-reviewer)

Keep local (1):
- agents/workflow/lint.md (Python tooling: ruff/mypy/djlint/bandit; upstream
  deleted the file). Fixed pre-existing duplicate "2." numbering bug.

Restore from upstream (1):
- agents/review/data-integrity-guardian.md (kept for GDPR/CCPA privacy
  compliance angle not covered by data-migrations-reviewer)

Merge both (6) -- upstream structural wins layered with fork intent:
- agents/research/best-practices-researcher.md (upstream <examples> removal +
  fork's Rails/Ruby -> Python/FastAPI translations)
- skills/ce-brainstorm/SKILL.md (universal-brainstorming routing + Slack
  context + non-obvious angles + fork's Deploy wiring flag)
- skills/ce-plan/SKILL.md (universal-planning routing + planning-bootstrap +
  fork's two Deploy wiring check bullets)
- skills/ce-review/SKILL.md (Run ID, model tiering haiku->sonnet, compact-JSON
  artifact contract, file-type awareness, cli-readiness-reviewer + fork's
  zip-agent-validator, design-conformance-reviewer, Stage 6 Zip Agent
  Validation)
- skills/ce-review/references/persona-catalog.md (cli-readiness row + adversarial
  refinement + fork's Language & Framework Conditional layer; 22 personas total)
- skills/ce-work/SKILL.md (Parallel Safety Check, parallel-subagent constraints,
  Phase 3-4 compression + fork's deploy-values self-review row, with duplicate
  checklist bullet collapsed to single occurrence)

## Auto-applied (no triage needed)

- 225 remote-only files: accepted as-is (new docs, brainstorms, plans,
  upstream skills, tests, scripts)
- 70 local-only files: 46 preserved as-is (kieran-python, tiangolo-fastapi,
  zip-agent-validator, design-conformance-reviewer, essay/proof commands,
  excalidraw-png-export, etc.); 24 stayed deleted (dhh-rails-style,
  andrew-kane-gem-writer, dspy-ruby Ruby skills no longer needed)

## README updated

- Removed Design section (3 deleted agents)
- Removed deleted Review entries (data-migration-expert, dhh-rails-reviewer,
  kieran-rails-reviewer, performance-oracle, security-sentinel)
- Added new Review entries: design-conformance-reviewer, previous-comments-reviewer,
  tiangolo-fastapi-reviewer, zip-agent-validator
- Workflow: added lint
- Docs: replaced ankane-readme-writer with python-package-readme-writer

## Known issues (not introduced by merge decisions)

- 9 detect-project-type.sh tests fail on macOS bash 3.2 (script uses
  `declare -A` which requires bash 4+). Upstream regression in commit 070092d
  (#568). Resolution: install bash 4+ via `brew install bash` locally;
  upstream fix tracked separately.
- 2 review-skill-contract tests reference deleted agents (dhh-rails-reviewer,
  data-migration-expert). Pre-existing fork inconsistency, not new.

bun run release:validate: passes (46 agents, 51 skills, 0 MCP servers)

plugins/compound-engineering/agents/research/best-practices-researcher.md

@@ -24,7 +24,7 @@ Before going online, check if curated knowledge already exists in skills:
 
 2. **Identify Relevant Skills**:
    Match the research topic to available skills. Common mappings:
-   - Rails/Ruby → `dhh-rails-style`, `andrew-kane-gem-writer`, `dspy-ruby`
+   - Python/FastAPI → `fastapi-style`, `python-package-writer`
    - Frontend/Design → `frontend-design`, `swiss-design`
    - TypeScript/React → `react-best-practices`
    - AI/Agents → `agent-native-architecture`
@@ -82,7 +82,7 @@ Only after checking skills AND verifying API availability, gather additional inf
 
 2. **Organize Discoveries**:
    - Organize into clear categories (e.g., "Must Have", "Recommended", "Optional")
-   - Clearly indicate source: "From skill: dhh-rails-style" vs "From official docs" vs "Community consensus"
+   - Clearly indicate source: "From skill: fastapi-style" vs "From official docs" vs "Community consensus"
    - Provide specific examples from real projects when possible
    - Explain the reasoning behind each best practice
    - Highlight any technology-specific or domain-specific considerations
@@ -105,7 +105,7 @@ For GitHub issue best practices specifically, you will research:
 ## Source Attribution
 
 Always cite your sources and indicate the authority level:
-- **Skill-based**: "The dhh-rails-style skill recommends..." (highest authority - curated)
+- **Skill-based**: "The fastapi-style skill recommends..." (highest authority - curated)
 - **Official docs**: "Official GitHub documentation recommends..."
 - **Community**: "Many successful projects tend to..."