feat: Implement SQLite storage for CLI execution history

- Introduced a new SQLite-based storage backend for managing CLI execution history.
- Added `CliHistoryStore` class to handle conversation records and turns with efficient queries.
- Migrated existing JSON history files to the new SQLite format.
- Updated CLI executor to use asynchronous and synchronous methods for saving and loading conversations.
- Enhanced execution history retrieval with support for filtering by tool, status, and search terms.
- Added prompt concatenation utilities to build multi-turn prompts in various formats (plain, YAML, JSON).
- Implemented batch deletion of conversations and improved error handling for database operations.

ccw/package.json

@@ -31,6 +31,7 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.0.4",
+    "better-sqlite3": "^11.7.0",
     "boxen": "^7.1.0",
     "chalk": "^5.3.0",
     "commander": "^11.0.0",
@@ -54,6 +55,7 @@
     "url": "https://github.com/claude-code-workflow/ccw"
   },
   "devDependencies": {
+    "@types/better-sqlite3": "^7.6.12",
     "@types/gradient-string": "^1.1.6",
     "@types/inquirer": "^9.0.9",
     "@types/node": "^25.0.1",