feat(cli): Complete the check rule catalog

Add D002 (malformed attribute blocks), R004 (skipped declare rows), and V001-V005 (CSV data files). CSV checks run once per referenced file and also cover inline spark-table bodies.

Generate docs/reference.md from the known.ts catalog via npm run gen:reference, and add drift guards asserting the catalog matches the customElement call sites and the committed reference.

docs/check-plan.md

@@ -1,15 +1,19 @@
 # `tttk check` — implementation plan (validator-first)
 
-Status: **implemented (partial).** Supersedes `docs/compile-plan.md`.
+Status: **implemented.** Supersedes `docs/compile-plan.md`.
 
-Landed: `S001`/`S002`, `D001`, `R001`/`R002`/`R003`/`R005`/`R006`,
-`C001`–`C004`, `L001`/`L002`, `A001`/`A002`, with tests. The `check` command,
+Landed: `S001`/`S002`, `D001`/`D002`, `R001`–`R006`, `C001`–`C004`,
+`L001`/`L002`, `A001`/`A002`, `V001`–`V005`, with tests. The `check` command,
 `--json`/`--strict`/`--quiet`, and exit codes are live; the markdown module is
 the browser-safe one described in §4, and `readContentIndex` backs the walk.
+The reference generator (§7.11) and both drift guards (§7.12) are in place:
+`docs/reference.md` is generated from `known.ts` via `npm run gen:reference`,
+and `known.test.ts` asserts the catalog matches the `customElement` call sites
+and the committed reference.
 
-Not yet implemented: CSV data checks (`V001`–`V005`), `D002`, `R004`, and the
-reference generator + drift guard (§7.11–§7.12). The rule catalog in §5, the
-CLI surface in §6, and the resolved decisions in §10 remain the specification.
+Not implemented: `D003` (P2 — the legacy `:md-deck` directive is not flagged).
+The rule catalog in §5, the CLI surface in §6, and the resolved decisions in §10
+remain the specification.
 
 ## 1. Goal