Merge upstream origin/main with local fork additions preserved

Accept upstream's ce-review pipeline rewrite (6-stage persona-based
architecture with structured JSON, confidence gating, three execution
modes). Retire 4 overlapping review agents (security-sentinel,
performance-oracle, data-migration-expert, data-integrity-guardian)
replaced by upstream equivalents. Add 5 local review agents as
conditional personas in the persona catalog (kieran-python, tiangolo-
fastapi, kieran-typescript, julik-frontend-races, architecture-
strategist).

Accept upstream skill renames (file-todos→todo-create, resolve_todo_
parallel→todo-resolve), port local Assessment and worktree constraint
additions to new files. Merge best-practices-researcher with upstream
platform-agnostic discovery + local FastAPI mappings. Remove Rails/Ruby
skills (dhh-rails-style, andrew-kane-gem-writer, dspy-ruby) per fork's
FastAPI pivot.

Component counts: 36 agents, 48 skills, 7 commands.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

plugins/compound-engineering/skills/todo-create/SKILL.md

@@ -48,6 +48,13 @@ dependencies: ["001"]     # Issue IDs this is blocked by
 
 **Required sections:** Problem Statement, Findings, Proposed Solutions, Recommended Action (filled during triage), Acceptance Criteria, Work Log.
 
+**Required for code review findings:** Assessment (Pressure Test) — verify the finding before acting on it.
+
+- **Assessment**: Clear & Correct | Unclear | Likely Incorrect | YAGNI
+- **Recommended Action**: Fix now | Clarify | Push back | Skip
+- **Verified**: Code, Tests, Usage, Prior Decisions (Yes/No with details)
+- **Technical Justification**: Why this finding is valid or should be skipped
+
 **Optional sections:** Technical Details, Resources, Notes.
 
 ## Workflows