chore(governance): consolidate roadmap and backup policies

docs/archive/DATABASE_CONSOLIDATION_PLAN_2026_06_23.md

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+# Database Consolidation Plan (2026-06-23)
+
+> Archive candidate: this document records consolidation history and must not be treated as an operational source of truth.
+
+## Current State: FRAGMENTED
+- Canonical: src/quant_engine/ (2 files)
+- Scattered: outputs/ (10) + Temp/ (3)
+- Total: 15 database files
+
+## Issue
+1. kis_data_collection.db in 3 locations:
+   - src/quant_engine/ (CANONICAL)
+   - legacy/archive locations
+   - Temp/test_kis_data_collection.db
+
+2. snapshot_admin.db in 4+ locations:
+   - src/quant_engine/ (CANONICAL)
+   - legacy/archive locations
+   - Temp/snapshot_admin_*.db (multiple variants)
+   - unrelated DBs in other subtrees
+
+## Solution
+
+### Step 1: Verify Canonical Copies (src/quant_engine/)
+- kis_data_collection.db: 5 records [OK]
+- snapshot_admin.db: 0 records (initialized) [OK]
+
+### Step 2: Archive Scattered Files (archive_db/)
+Create archive directory with timestamp:
+```
+archive_db/
+├── 2026-06-23_outputs_kis_data_collection/
+├── 2026-06-23_outputs_snapshot_admin/
+├── 2026-06-23_temp_test_files/
+└── manifest.json (record what was archived)
+```
+
+### Step 3: Clean Obsolete References
+- Remove imports from legacy non-canonical DB paths
+- Remove imports from archive/backup DB paths
+- Update any code expecting these paths
+
+### Step 4: Update Documentation
+- Update all references to use: src/quant_engine/
+- Update deployment docs (Synology)
+- Update CI/CD workflows
+
+## Benefits
+- Single source of truth
+- Easier backup/recovery
+- Clear separation: live vs. archived
+- Faster data access
+- Simplified deployment
+
+## Files to Delete (After Archiving)
+- obsolete duplicate DBs outside canonical src/quant_engine/
+- transient Temp/ validation DBs after use