Adding an ingest stage / table to ax

Hard-won checklist - each step below has a CI gate that fails if you skip it.

New SurrealDB table

1. Add the DEFINE TABLE ... SCHEMAFULL + fields to packages/schema/src/schema.surql (top-level fields explicit; nested objects → JSON-encoded string; datetimes via JS Date).
2. Register it in SCHEMA_TABLES (apps/axctl/src/queries/insights.ts) - a mirror test diffs DEFINE TABLE names vs SCHEMA_TABLES and fails CI if missing.
3. In a worktree, run bun install so @ax/schema resolves to the worktree copy (not the main tree's symlink) before the mirror test will pass.

New derive-tagged ingest stage

1. Co-locate the StageDef at the bottom of the stage file (mirror apps/axctl/src/ingest/derive-opportunities.ts): export const FooKey = Schema.Literal("foo") + fooStage.
2. Register in apps/axctl/src/ingest/stage/registry.ts: add the import, add FooKey to the IngestStageKey Schema.Union([...]), add fooStage to ALL_STAGES.
3. Update apps/axctl/src/cli/effect-cli.test.ts: bump the resolveIngestStages: default runs every stage .toHaveLength(N) by 1, and add your key (sorted) to the --derive-only list. CI fails otherwise.
4. Isolate failures: wrap the stage body in Effect.catchCause returning a zero-row stat, so a stage error never aborts the surrounding ingest.

New CLI subcommand

Document it in BOTH cli-reference gates or CI fails: docs/cli.md (or README) + apps/site/public/llms.txt (scripts/check-cli-reference.ts), AND a card in apps/site/app/routes/docs/-cli-reference.data.ts (scripts/check-site-cli-reference.test.ts).

Effect v4 beta gotchas

• Multi-arg Schema.Literal(...) collapses → use Schema.Literals([...]).
• Schema.Date doesn't JSON round-trip → use Schema.DateFromString.check(Schema.isDateValid()).