* refactor(context): export and describe mapping shape schemas
* feat(context): add driver-schemas module with warehouse drivers
* feat(context): add metabase, looker, lookml driver schemas with mappings
* feat(context): add notion, dbt, metricflow driver schemas
* refactor(context): make connectionSchema a driver-discriminated union
* chore(context): re-export KtxConnectionConfig from project package
* docs(context): add connection driver schema plan
* chore(secrets): allowlist example credentials in driver-schemas fixtures
* test(cli): align metabase fixtures with required api_url field
The driver-discriminated union added in this branch now requires api_url
for metabase connections and a known driver for warehouses. Update slow
CLI test fixtures and assertions so they exercise the new schema:
- ingest.test-utils.ts: add api_url to the prod-metabase fixture.
- setup.test.ts: switch metabase fixture from 'url' to 'api_url'.
- local-scan-connectors.test.ts: invalid-driver/missing-driver tests now
expect the schema error from loadKtxProject (parse-time rejection).
* feat(cli): extend `ktx connection test` to every supported driver
Dispatch by driver: native DBs now call `connector.testConnection()`
(was `introspect(dryRun)`), looker/notion/metabase hit their auth
endpoints, and dbt/metricflow/lookml run `git ls-remote` via the
existing `testRepoConnection` helper. Unknown drivers exit 1 with a
listing of supported ones.
* feat(cli): add `ktx connection test --all` summary list
Tests every configured connection in parallel and renders a single
Clack-style list (◇/│/◆/└, green ✓ / red ✗) consistent with sl list,
with per-row detail and a passed/failed footer. Exits non-zero if any
connection fails. Single-id `ktx connection test` output is preserved.
* fix(cli): read metabase status url from api_url
`ktx status` was probing `url` / `base_url` on metabase connections, but
ktx.yaml stores it as `api_url`, so the field always reported "url not
set". Read `api_url` directly and align the warning text with the actual
key.
