de7973f35b
Mirrors the API-side row-colour whitelist at the database layer so any out-of-band write path (manual psql, future bulk-import jobs, restored backups) cannot smuggle an unrenderable colour past the Zod guard introduced in #288. Changes: - lib/db/src/schema/executive-meetings.ts: export new shared constant EXECUTIVE_MEETING_ROW_COLOR_KEYS (red/amber/green/blue/violet/gray) + ExecutiveMeetingRowColor union type. Add a Drizzle check() constraint named `executive_meetings_row_color_palette_check` that allows NULL or any of the six keys. The CHECK uses sql.raw to inline the palette as quoted SQL literals (PG CHECK definitions are DDL and reject parameter placeholders); safe because the keys come from a hardcoded compile-time constant of single-word identifiers, never user input. Generating the literal list from the same constant guarantees the API guard and the DB constraint stay in sync. - artifacts/api-server/src/routes/executive-meetings.ts: import EXECUTIVE_MEETING_ROW_COLOR_KEYS from @workspace/db and rewire rowColorSchema to z.enum(EXECUTIVE_MEETING_ROW_COLOR_KEYS).nullable(). Deletes the local ROW_COLOR_KEYS const so the palette has exactly one source of truth. No behaviour change at runtime. - artifacts/api-server/tests/executive-meetings-row-color.test.mjs: append a focused defense-in-depth test that bypasses the API and asserts (a) NULL is allowed, (b) each of the six palette keys round-trips on raw UPDATE, (c) off-palette UPDATEs reject with PG SQLSTATE 23514 referencing the constraint by name, (d) the row keeps its previous colour after the rejected updates, and (e) raw INSERT with an off-palette value is rejected the same way. Migration applied via pnpm --filter @workspace/db push (no destructive prompts; existing rows are NULL or valid keys from #288 so the constraint installs cleanly). All 7 tests in the row-color file pass. Architect review: APPROVED, no critical findings. The single pre-existing Reorder test failure in the wider suite is unrelated to this change (Reorder does not touch row_color).