refactor(cli): delete internal barrel index.ts files

The 34 `index.ts` re-export barrels inside `packages/cli/src/` were
holdovers from the pre-fold multi-workspace structure. Post-fold-in they
served no production purpose: external consumers go through the single
package main entry, and in-repo callers mostly imported through them
only because the path was short. Internally, knip flagged most barrel
re-exports as production-dead (only reached via tests).

This change:
- Deletes every internal barrel except `packages/cli/src/index.ts`
  (the published package entry).
- Rewrites ~270 source/test files to import each name directly from
  the file that defines it.
- Moves `tools/warehouse-verification/index.ts` to
  `create-warehouse-verification-tools.ts` (the function it defined
  locally) and updates its single consumer.
- Renames `search/backend-conformance.ts` → `.test-utils.ts` to match
  the existing test-helper file convention.
- Deletes 13 dead test-only chains (dbt-descriptions/*,
  live-database/extracted-schema, live-database/structural-sync,
  relationship-* feedback/review chain) plus their tests and a
  cascading orphan integration test.
- Updates test mocks that pointed at deleted barrel paths
  (notion-client, connector barrels in scan/local-scan-connectors
  tests) to mock the source files instead.
- Points the maintainer benchmark script
  (`scripts/relationship-benchmark-report.mjs`) at source files
  instead of `dist/context/scan/index.js`.
- Drops the barrel `!` entries from `knip.json`; adds explicit
  production entries only for the benchmark code reached via dist by
  the maintainer script.

Net: 413 files changed, ~1.2k insertions, ~9.4k deletions.

`pnpm run dead-code` (Biome + knip default + knip production) and
`pnpm run type-check` are clean; 2277 tests pass.

packages/cli/src/ingest.ts

@@ -1,24 +1,13 @@
-import {
-  buildMemoryFlowViewModel,
-  createMemoryFlowLiveBuffer,
-  formatMemoryFlowFinalSummary,
-  getLatestLocalIngestStatus,
-  getLocalIngestStatus,
-  type IngestReportSnapshot,
-  ingestReportToMemoryFlowReplay,
-  type LocalMetabaseFanoutResult,
-  type LocalMetabaseFanoutProgress,
-  type MemoryFlowEvent,
-  type MemoryFlowReplayInput,
-  type RunLocalIngestOptions,
-  renderMemoryFlowReplay,
-  runLocalIngest,
-  runLocalMetabaseIngest,
-  savedMemoryCountsForReport,
-  sanitizeMemoryFlowError,
-} from './context/ingest/index.js';
-import type { KtxSqlQueryExecutorPort } from './context/connections/index.js';
-import { loadKtxProject, type KtxLocalProject } from './context/project/index.js';
+import { buildMemoryFlowViewModel } from './context/ingest/memory-flow/view-model.js';
+import { createMemoryFlowLiveBuffer, sanitizeMemoryFlowError } from './context/ingest/memory-flow/live-buffer.js';
+import { formatMemoryFlowFinalSummary } from './context/ingest/memory-flow/summary.js';
+import { getLatestLocalIngestStatus, getLocalIngestStatus, type LocalMetabaseFanoutResult, type LocalMetabaseFanoutProgress, type RunLocalIngestOptions, runLocalIngest, runLocalMetabaseIngest } from './context/ingest/local-ingest.js';
+import { type IngestReportSnapshot, savedMemoryCountsForReport } from './context/ingest/reports.js';
+import { ingestReportToMemoryFlowReplay } from './context/ingest/memory-flow/events.js';
+import type { MemoryFlowEvent, MemoryFlowReplayInput } from './context/ingest/memory-flow/types.js';
+import { renderMemoryFlowReplay } from './context/ingest/memory-flow/render.js';
+import type { KtxSqlQueryExecutorPort } from './context/connections/query-executor.js';
+import { loadKtxProject, type KtxLocalProject } from './context/project/project.js';
 import { resolveProjectEmbeddingProvider } from './embedding-resolution.js';
 import { createKtxCliIngestQueryExecutor } from './ingest-query-executor.js';
 import { readIngestReportSnapshotFile } from './ingest-report-file.js';