[1.6.1] - 2026-04-19

Refactored

• API orchestration (api.py): initialize_services (66 lines, CC~8) →
  _init_searcher + _init_cache + _init_metrics + 8-line orchestrator.
  _record_upload_failure extracted — eliminates 2× duplicated
  record_file_upload + record_error blocks in upload_single_file.

• Admin auth (admin_routes.py): _get_admin_user (77 lines, CC~10) →
  _parse_bearer_token + _try_oauth_admin + _resolve_key_admin + 5-line
  orchestrator. Fixes reverse_field_glyphs rebuilt on every recursive call.

• Engine (engine/chronos_grid.py): seek_vector_resonance (80 lines,
  2 code paths) → _hnsw_vector_resonance + _brute_vector_resonance +
  10-line dispatcher (HNSW path vs brute-force cosine similarity).

• Engine (engine/gravitas_pack.py): _compress_dict / _decompress_dict
  clone cluster → _transform_dict(obj, key_map, value_transform) dispatch table.
  Both callers become 2-line delegators.

Changed

• eval_self.py: CORPUS_FILES split into AUDIT_CORPUS (11 docs) +
  SOURCE_CORPUS (7 source files). CORPUS_FILES = AUDIT_CORPUS + SOURCE_CORPUS
  preserves existing full-pack behaviour; AUDIT_CORPUS alone enables lightweight
  doc-quality runs.

• .gitignore: docs/history/ added under "Historical development artifacts".

Tests

• 475 passed, 13 skipped — same count as v1.6.0 (1 pre-existing flaky timing test
  in full suite; passes in isolation).