380c4238eff1ed15ab794261afe4c8e3ee8aa569
Sub-phase 3k of ADR-0033. Adds the Tier-3 end-to-end DML suite (tests/sql_dml_e2e.rs) and the cross-cut gap-fill tests, fills the verification matrix (every row a verified file::function), and produces the phase-exit report. - tests/sql_dml_e2e.rs: INSERT…SELECT cross-table, all-ten-type multi-row INSERT + RETURNING type recovery, UPDATE-with-subquery-in-SET, cascade DELETE, UPSERT round-trip, RETURNING x3, history.log replay, OOS rejections (full §13 table), validity-indicator-from-SQL-DML. - walker/mod.rs, highlight.rs, completion.rs, input_render.rs: inherited-diagnostic, DML-keyword highlight, INSERT INTO completion, and advanced-mode DML hint-panel cross-cuts. - Matrix correction (user-confirmed): predicate warnings fire on row-scoped DML slots; INSERT VALUES has no row scope (ADR-0033 §8.4). - Auto-snapshot row marked N/A (user-confirmed): ADR-0006 unimplemented for both paths; deferred. /runda round: added an advanced-mode DML hint-panel test (A6 was attributed to simple-mode prose under the §8 advanced heading); extended OOS coverage to the full ADR-0033 §13 table (OOS-5 INDEXED BY / OOS-6 multi-statement) + a trailing-semicolon guard. 1645 passing / 0 failing / 0 skipped / 1 ignored. Clippy clean.
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