cleanup: remove dead code and duplicate docs

- Remove session-ses_2f27.md (161KB raw session log)
- Remove 49 ROOT_* duplicate files across REFERENCE/
- Remove 14 duplicate files between REFERENCE/ root and history/
- Remove asr_legacy.rs (dead code, replaced by asr.rs)
- Remove src/core/worker/ (duplicate JobWorker)
- Remove src/core/layers/ (empty directory)
- Remove 4 .bak files in src/
- Remove 7 dead private methods in worker/processor.rs
- Remove backup directory from git tracking

.gitignore

@@ -1,92 +1,79 @@
-# Environment - Local configs (NEVER commit these)
-.env
-.env.local
-.env.*.local
 
-# Build artifacts
-target/
-venv/
-
-# Generated files
-thumbnails/
-*.asr.json
-*.probe.json
-test_asr.json
-
-# Local output (machine learning results)
-output/
-*.pt
-
-# Cache
-.ruff_cache/
-
-# OS files
-.DS_Store
-.Spotlight-V100
-.Trashes
-
-# Logs
-*.log
-
-# SSH keys (NEVER commit)
-id_*
-!id_*.pub
-
-# IDE and editor
-.vscode/
-.idea/
-*.swp
-*.swo
-*~
-
-# Documentation backups
-# docs_v1.0/ (Moved to active tracking)
-
-# Frontend dependencies
-node_modules/
-portal/src-tauri/target/
-
-# Python cache
 __pycache__/
-*.pyc
-*.pyo
-
-# Test artifacts
-test_output/
-test_output_simple/
-test_output_v2/
-*.mp4
-*.pt
-server.pid
-server.pid.*
-
-# Backup files
-*.bak
-*.backup
-*.bak[0-9]
-
-# Model files
-models/
-model_checkpoints/
-pretrained_models/
-
-# Desktop app
-momentry_desktop/
-
-# Release artifacts (track docs, ignore binaries)
-release/*.zip
-release/momentry_v*
-release/*.sql
-release/dev_data_*.sql
-release/public_schema_*.sql
-release/migrate_*.sql
-
-# But track release documentation
+!id_*.pub
 !release/*.md
 !release/*.txt
-
+.DS_Store
+.env
+.env.*.local
+.env.local
+.idea/
+.ruff_cache/
+.Spotlight-V100
+.Trashes
+.vscode/
+*.asr.json
+*.backup
+*.bak
+*.bak[0-9]
+*.log
+*.mp4
+*.probe.json
+*.pt
+*.pyc
+*.pyo
+*.swo
+*.swp
+*~
+# Backup files
+# Build artifacts
+# But track release documentation
+# Cache
 # Data directories
-data/
-
+# Desktop app
+# docs_v1.0/ (Moved to active tracking)
+# Documentation backups
+# Environment - Local configs (NEVER commit these)
+# Frontend dependencies
+# Generated files
+# IDE and editor
+# Local output (machine learning results)
+# Logs
+# Model files
+# OS files
+# Portal build artifacts
+# Python cache
+# Release and output directories
+# Release artifacts (track docs, ignore binaries)
+# SSH keys (NEVER commit)
 # System status
+# Test artifacts
+data/
+id_*
+model_checkpoints/
+models/
+momentry_desktop/
+momentry_runtime/
+node_modules/
+output/
+portal/dist/
+portal/node_modules/
+portal/src-tauri/target/
+pretrained_models/
+release/
+release/*.sql
+release/*.zip
+release/dev_data_*.sql
+release/migrate_*.sql
+release/momentry_v*
+release/public_schema_*.sql
+server.pid
+server.pid.*
 system_status_*.md
+target/
+test_asr.json
+test_output_simple/
+test_output_v2/
+test_output/
+thumbnails/
+venv/