chore: Archive all pending OpenSpec proposals

Force archive the following proposals:
- add-audio-device-selector (complete)
- add-embedded-backend-packaging (19/26 tasks)
- add-flexible-deployment-options (20/21 tasks)

New specs created:
- audio-device-management (7 requirements)
- embedded-backend (8 requirements)

Updated specs:
- transcription (+2 requirements for model download progress)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

openspec/changes/archive/2025-12-22-add-flexible-deployment-options/proposal.md

@@ -0,0 +1,18 @@
+# Change: Add Flexible Deployment Options
+
+## Why
+Enterprise deployment environments vary significantly. Some networks block MySQL port 33306, preventing access to cloud databases. Additionally, the current portable executable extracts to a random folder in `%TEMP%`, causing Windows Defender warnings on each launch and potential permission issues.
+
+## What Changes
+- **SQLite database support** - Allow choosing between MySQL (cloud) and SQLite (local) databases at build time via `--database-type` parameter
+- **Fixed portable extraction path** - Configure `unpackDirName` to use a predictable folder name instead of random UUID
+
+## Impact
+- Affected specs: `embedded-backend` (modified)
+- Affected code:
+  - `client/config.json` - Add `database.type` and `database.sqlitePath` fields
+  - `client/package.json` - Add `unpackDirName` to portable configuration
+  - `backend/app/config.py` - Add `DB_TYPE` and `SQLITE_PATH` settings
+  - `backend/app/database.py` - Conditional SQLite/MySQL initialization
+  - `backend/run_server.py` - Pass database type environment variables
+  - `scripts/build-client.bat` - Add `--database-type` parameter