Wave 7 close-out: the embedding ledger seam dies; notes birth via mapping lines

Part 1 — the ledger + remnants interlude (master-dispatched, owner ruling
2026-09-23: nothing configures the graph beyond chat models):

- The embedding ledger surface is gone: readEmbeddings/writeEmbeddings
  ports, the EmbeddingsLedger contract, EMBEDDINGS_FILE (config, store
  impls, graphRevision source list), and graph-deletion's vector-pruning
  step. On-disk data files stay untouched (inert history).
- The extraction embedder seam dies wholesale: ExtractionPipelineDeps
  drops the embedder dep (chat-handler + backfill/import-notes stubs go
  with it), the 'embedding' phase leaves ExtractionPhase, the usage
  capture/persist helpers die, and stages.embedding leaves
  ExtractionRunUsage (historical records keep their shape — reads are
  lenient). Extraction is two stages again, like the local-embedder era.
- Consumer-less remnants: latestQuizOutcomes + QUIZ_EVENT_KINDS,
  clusterContentId, matchClusterLabelings + Community + ClusterLabeling,
  the readClusterLabels/appendClusterLabel port seams + store impls +
  LEDGER_FILES.clusterLabels. NamingRunUsage/readNamingRuns STAY
  (standing ruling — the cost pill renders historical naming spend);
  clusterHue + MIN_CLUSTER_SIZE stay (live).
- The 'labeler' role dies: BACKGROUND_MODEL_ROLES, ROLE_SLOT, ModelRole,
  the catalog pin projections, and the UI roster strings. RolePins keys
  shrink with the union.

The notes birth fallback (owner-approved 2026-09-23, surfaced by the
interlude's live smoke: production notes imports create provenance-EMPTY
nodes (importNotes passes messages: null — the file's anchor is the
mapping line), so the provenance-only birth rule left every imported
file unclustered and invisible to the prober's session list, against the
locked file-birth ruling. A provenance-empty node now births under its
FIRST mapping line's chatId (ledger order); only notes-born nodes ever
hit the fallback (chat nodes always carry provenance; a re-encountered
node's link-append re-opens the provenance rule). Deletion-safe: mapping
lines of deleted chats are stripped alongside their provenance.

Live-verified on port 3004: a fresh notes import clusters under its
src_ id with the file path as the label, end to end with no embedder.

845/845 tests, typecheck/lint/build green.
EOF
)

config.ts

@@ -49,8 +49,7 @@ export type ModelRole =
 	| "visualMaker"
 	| "pdfReader"
 	| "extractor"
-	| "auditor"
-	| "labeler";
+	| "auditor";
 
 /**
  * The extraction pipeline (vision §1 construction): the sole graph writer.
@@ -85,8 +84,6 @@ export const LEDGER_FILES = {
 	 *  the checkpoint's replacement for chat extractions — notes keep
 	 *  sessions.jsonl, whole-file as they are). */
 	coverage: path.join(PATHS.graph, "coverage.jsonl"),
-	/** LLM-named community records (contracts/graph.ts ClusterLabeling). */
-	clusterLabels: path.join(PATHS.graph, "cluster-labels.jsonl"),
 	/** Cluster-naming run usage (contracts/graph.ts NamingRunUsage) — the
 	 *  money channel's third stage; graph-global, so its own ledger. */
 	namingRuns: path.join(PATHS.graph, "naming-runs.jsonl"),
@@ -103,12 +100,6 @@ export const SOURCES_FILE = path.join(PATHS.graph, "sources.json");
  *  Carries an updatedAt stamp for future live-physics conflict handling. */
 export const POSITIONS_FILE = path.join(PATHS.graph, "positions.json");
 
-/** The embedding ledger: one L2-normalized vector per node id, all from
- * ONE model (swapping models re-embeds everything — vectors from
- * different models live in incompatible spaces). Read-modify-write
- * JSON like positions/sources. */
-export const EMBEDDINGS_FILE = path.join(PATHS.graph, "embeddings.json");
-
 /**
  * Graph render settings (the settings-panel controls): one small JSON blob,
  * read-modify-write. Shared shape/sanitizer: src/core/render-settings.ts.