chore: restore original directory structure (project under code-review-graph-main/)

code-review-graph-main/skills/project-review/references/common-mistakes.md

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+# Unified Review — Common Mistakes
+
+- **Skipping graph context** — always run `get_minimal_context` first; CRG
+  context is what makes the review token-efficient and blast-radius aware.
+- **Rushing to fix** — this skill is READ-ONLY. Present findings, wait for
+  user decision. Never apply fixes, commit, or push.
+- **Ignoring tier** — read `.code-review.yaml`. `fast` skips Layer 2/3;
+  `strict` requires per-item confirmation for every blocker/major.
+- **Judging metrics without evidence** — `score_review_tool` outputs are
+  heuristics. Cite the evidence, and let the LLM confirm SQL/exception/vuln
+  findings before presenting them as facts.
+- **Missing manual-review modules** — payment, order, inventory, permission,
+  distributed-lock, data-migration always require a manual review checklist.
+- **Forgetting enum completeness reads OUTSIDE the diff** — grep sibling
+  values, then read each consumer; in-diff review alone is insufficient.
+- **Batch-skipping blockers** — 🔴 blockers cannot be batch-skipped; each
+  needs an explicit user decision.
+- **Not producing the report** — always call `generate_report_tool` at the
+  end and present the text report inline.