feat(scoring): completed roadmap Phase 1 & 2 with edge case stability v2.74.0

docs/PROJECT_CHRONICLE_GUARD_ROADMAP.md

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+# Project Chronicle Guard: Search Engine Roadmap
+
+## 🎯 Current Status: v2.74.0
+- [x] **Phase 1: Linguistic Foundation Stabilization** (Completed)
+- [x] **Phase 2: Conflict Scoring Refinement** (Completed)
+- [ ] **Phase 3: Performance Scaling & Caching** (In Progress)
+- [ ] **Phase 4: Excerpt Precision Tuning** (Planned)
+- [ ] **Phase 5: Downstream Integration API** (Planned)
+
+---
+
+## 🔬 Phase Details
+
+### Phase 1: Linguistic Foundation (v2.72.0 - v2.74.0)
+- **Goal**: Perfect tokenization for mixed KO/EN/Special characters.
+- **Achievement**: 
+    - Bilingual boundary split (e.g., 'Astra의' -> 'Astra', '의').
+    - Hangeul monosyllable preservation (e.g., '한', '글').
+    - Zero-width character cleaning.
+
+### Phase 2: Conflict Scoring (v2.73.0 - v2.74.0)
+- **Goal**: Quantitative risk assessment for information conflicts.
+- **Achievement**:
+    - Tiered severity logic (NONE, LOW, MEDIUM, HIGH).
+    - Substring-based detection to overcome particle interference.
+    - Configurable thresholds via `SCORING_CONFIG`.
+
+### Phase 3: Performance Scaling (v2.75.0+)
+- **Goal**: Sub-10ms response for 10k+ documents.
+- **Action**:
+    - Global module-level caching for IDF and tokens.
+    - Potential worker thread offloading for heavy scoring.
+
+### Phase 4: Excerpt Precision (Planned)
+- **Goal**: Maximize context signal-to-noise ratio.
+- **Action**:
+    - Density-based window starting point restriction.
+    - Multi-stage filtering for optimal text chunking.
+
+### Phase 5: Integration (Planned)
+- **Goal**: Seamless RAG pipeline integration.
+- **Action**:
+    - Strict IO schema definition for downstream AI agents.