chore(8.0): Phase A + B — purge all @deprecated APIs + cacheManager dead branches

PHASE A — every @deprecated marker resolved (~25 removed)

src/coreTypes.ts
- GraphVerb: dropped the "@deprecated Will be replaced by HNSWVerbWithMetadata"
  note. GraphVerb IS the canonical contract — every public API path speaks
  it. Removed the `source` and `target` legacy alias fields (renamed `from`
  / `to` callers years ago; no consumers remain).
- StorageAdapter: dropped the "@deprecated Use getNouns() with filter" notes
  from `getNounsByNounType`, `getVerbsBySource`, `getVerbsByTarget`,
  `getVerbsByType`. They were never deprecated in spirit — they're useful
  non-paginated convenience wrappers over the paginated `getNouns()` /
  `getVerbs()` surface. Refreshed JSDoc to explain the role.

src/types/graphTypes.ts
- Mirrored the GraphVerb cleanup: dropped `source` + `target` legacy aliases.
  sourceId + targetId are the canonical fields.

src/import/ImportCoordinator.ts
- Deleted the entire DeprecatedImportOptions interface block (130 LOC). It
  was a v3 → v4 migration tool using the `?: never` trick to force
  compile errors on dropped options. Five major versions in, the
  forced-error gate is no longer pulling its weight.

src/triple/TripleIntelligence.ts
- Deleted `TripleIntelligenceEngine = any` alias. No consumers; superseded
  by `TripleIntelligenceSystem`.

src/storage/cow/binaryDataCodec.ts
- Deleted `wrapBinaryData()`. The COW dispatch layer in `baseStorage.ts`
  routes by key-prefix convention; the old guess-by-JSON-parse codec was
  fragile (compressed bytes can accidentally parse as JSON) and unused.

src/storage/baseStorage.ts
- Refreshed JSDoc on `convertHNSWVerbToGraphVerb()` — the method is alive
  and used internally; the deprecation note was stale.

src/embeddings/wasm/AssetLoader.ts → DELETED
- File was @deprecated since model weights moved into the Candle WASM
  bundle. No consumers. Removed from `embeddings/wasm/index.ts` exports.

src/embeddings/wasm/types.ts
- Dropped @deprecated tags on `TokenizerConfig` + `TokenizedInput` — still
  used by `WordPieceTokenizer` (auxiliary tokenization). Deleted
  `InferenceConfig` (truly dead). Updated `embeddings/wasm/index.ts`
  exports.

src/utils/metadataIndex.ts
- Deleted `getIdsForCriteria()` — pure alias for `getIdsForFilter()`, no
  consumers.

src/interfaces/IIndex.ts
- Removed RebuildOptions.lazy (deprecated and unused; lazy mode is auto-
  selected by available-memory detection).

src/hnsw/hnswIndex.ts
- Removed `getNouns()` (returned a full Map; deprecated in favor of
  pagination years ago and no consumers in src/ or tests/).

PHASE B — cacheManager dead StorageType branches

src/storage/cacheManager.ts
- Collapsed the `isRemoteStorage` flag and its 15 dead conditional branches
  spanning calculateOptimalCacheSize() and calculateOptimalBatchSize().
  After dropping cloud adapters in step 7, `coldStorageType` is never S3
  or REMOTE_API; the branches were dead. Cache sizing and batch sizing now
  honor the filesystem-only reality with simpler heuristics.
- Collapsed `detectWarmStorageType()` + `detectColdStorageType()` from
  ~40 LOC of environment-+-availability branching to 2-line returns of
  `StorageType.FILESYSTEM`. Brainy 8.0 ships filesystem + memory only.

NOT YET — Phases C-G in follow-up commits

C: storageAutoConfig.ts + zeroConfig + extensibleConfig + sharedConfigManager
D: TODO/FIXME sweep across src/
E: skipped tests + the parallel-test race condition
F: docs deep clean (BATCHING, augmentations, READMEs)
G: browser support drop (the last 2 @deprecated)

VERIFICATION

- npx tsc --noEmit: clean
- npm test: 1408 / 1409 (same pre-existing race-condition outstanding)

src/brainy.ts

@@ -1971,8 +1971,6 @@ export class Brainy<T = any> implements BrainyInterface<T> {
         vector: relationVector,
         sourceId: params.from,
         targetId: params.to,
-        source: params.from,
-        target: params.to,
         verb: params.type,
         type: params.type,
         ...(params.subtype !== undefined && { subtype: params.subtype }),
@@ -2013,9 +2011,7 @@ export class Brainy<T = any> implements BrainyInterface<T> {
             ...verb,
             id: reverseId,
             sourceId: params.to,
-            targetId: params.from,
-            source: params.to,
-            target: params.from
+            targetId: params.from
           }
 
           // Operation 4: Save reverse verb vector data
@@ -2162,8 +2158,6 @@ export class Brainy<T = any> implements BrainyInterface<T> {
       vector: existingAny.vector,
       sourceId: existingAny.sourceId,
       targetId: existingAny.targetId,
-      source: existingAny.sourceId,
-      target: existingAny.targetId,
       verb: newVerbType,
       type: newVerbType,
       ...(params.subtype !== undefined