Ingest community feedback submissions in plan2code-metrics

Adds a CLI flow that lists open community-feedback issues via gh, validates
and parses each METRICS_JSON payload, imports them deduped by run_id,
re-aggregates and closes the issue. Community runs cohort by Plan2Code
version rather than prompt fingerprint, and local cohorts stay preferred so
ingested feedback never displaces the maintainer's current generation. Adds
Devin CLI as an AI backend.

AI Assisted

plan2code-metrics/README.md

@@ -116,9 +116,10 @@ plan2code-metrics
 | **Collect metrics** | Parse a completed project spec and extract step-by-step metrics into a run JSON |
 | **Import run data** | Copy a run JSON from another project into the local metrics store |
 | **View metrics status** | Show aggregated metrics with health indicators and generation deltas |
-| **Run analysis** | AI-powered diagnosis of weak steps (requires Claude Code or Copilot CLI) |
+| **Run analysis** | AI-powered diagnosis of weak steps (requires Claude Code, GitHub Copilot CLI, or Devin CLI) |
 | **Generate improvement proposal** | AI generates surgical prompt edits based on a diagnosis |
 | **Review and apply** | Interactive diff review to accept/reject individual edits |
+| **Fetch community submissions** | List open community-feedback GitHub issues, parse + validate their METRICS_JSON payload, import into the local run store, and close them |
 
 ### Each Time You Finish a Spec
 
@@ -256,6 +257,7 @@ The analysis and improvement steps require an AI agent. Two backends are support
 |---------|---------|-------|
 | **Claude Code** | `claude` | Uses `--print` mode. Recommended. |
 | **GitHub Copilot CLI** | `copilot` | Uses stdin piping with `--allow-all-tools -s`. |
+| **Devin CLI** | `devin` | Uses `--print --prompt-file <file> --permission-mode dangerous`. |
 
 Model selection is interactive — choose from available models when prompted.
 
@@ -271,7 +273,8 @@ src/
 ├── analyzer.ts                # AI diagnosis via LLM invocation
 ├── improver.ts                # AI improvement proposal + validation
 ├── applier.ts                 # Interactive diff review + file patching
-├── invoke-llm.ts              # Unified LLM invocation (Claude Code / Copilot CLI)
+├── community.ts               # Community-feedback issue parsing + ingestion
+├── invoke-llm.ts              # Unified LLM invocation (Claude / Copilot / Devin)
 ├── index.ts                   # Public API exports
 └── prompts/
     ├── analyze.md             # AI prompt template for diagnosis