docs: label all performance claims as MEASURED vs PROJECTED (NO FAKE CODE compliance)

Fixed 10 evidence violations across 5 files per NO FAKE CODE policy:
- All billion-scale claims now labeled as PROJECTED (not yet benchmarked)
- Distinguishes calculated projections from empirical measurements
- Maintains architectural honesty about what's tested vs theoretical

Files updated:
- src/hnsw/typeAwareHNSWIndex.ts (2 claims)
- src/utils/metadataIndex.ts (1 claim)
- src/query/typeAwareQueryPlanner.ts (1 claim)
- docs/architecture/finite-type-system.md (2 claims)
- CHANGELOG.md (4 claims)

Changes:
- 87% HNSW memory reduction → PROJECTED (calculated from architecture)
- 86% metadata memory reduction → PROJECTED (calculated from chunking)
- 385x type tracking reduction → PROJECTED (calculated from Uint32Array)
- 40% query latency reduction → PROJECTED (calculated from graph reduction)

All claims remain architecturally sound but are now honestly labeled.
Future TIER 4 work will add benchmarks to upgrade PROJECTED → MEASURED.

Audit document: .strategy/EVIDENCE_VIOLATIONS_AUDIT.md

src/hnsw/typeAwareHNSWIndex.ts

@@ -2,8 +2,8 @@
  * Type-Aware HNSW Index - Phase 2 Billion-Scale Optimization
  *
  * Maintains separate HNSW graphs per entity type for massive memory savings:
- * - Memory @ 1B scale: 384GB → 50GB (-87%)
- * - Query speed: 10x faster for single-type queries
+ * - Memory @ 1B scale: PROJECTED 384GB → 50GB (-87% from architectural analysis, not yet benchmarked)
+ * - Query speed: PROJECTED 10x faster for single-type queries (not yet benchmarked)
  * - Storage: Already type-first from Phase 1a
  *
  * Architecture:
@@ -54,7 +54,7 @@ export interface TypeAwareHNSWStats {
  * TypeAwareHNSWIndex - Separate HNSW graphs per entity type
  *
  * Phase 2 of billion-scale optimization roadmap.
- * Reduces HNSW memory by 87% @ billion scale.
+ * PROJECTED: Reduces HNSW memory by 87% @ billion scale (calculated from architecture, not yet benchmarked).
  */
 export class TypeAwareHNSWIndex {
   // One HNSW index per noun type (lazy initialization)