chore: remove all better-sqlite3 references from codebase (#357)

* fix: export/import scripts now use API instead of direct DB access

Export script fix:
- Add format=json parameter to SearchManager for raw data output
- Add getSdkSessionsBySessionIds method to SessionStore
- Add POST /api/sdk-sessions/batch endpoint to DataRoutes
- Refactor export-memories.ts to use HTTP API

Import script fix:
- Add import methods to SessionStore with duplicate detection
- Add POST /api/import endpoint to DataRoutes
- Refactor import-memories.ts to use HTTP API

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

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

* fix: update analyze-transformations-smart.js to use bun:sqlite

Replace better-sqlite3 import with bun:sqlite to align with v7.1.0 migration.

* chore: remove all better-sqlite3 references from codebase

- Updated scripts/analyze-transformations-smart.js to use bun:sqlite
- Merged PR #332: Refactored import/export scripts to use worker API instead of direct DB access
- Updated PM2-to-Bun migration documentation

All better-sqlite3 references have been removed from source code.
Documentation references remain as appropriate historical context.

* build: update plugin artifacts with merged changes

Include built artifacts from PR #332 merge and analyze-transformations-smart.js update.

---------

Co-authored-by: lee <loyalpartner@163.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src/services/worker/SearchManager.ts

@@ -87,7 +87,7 @@ export class SearchManager {
       try {
         // Normalize URL-friendly params to internal format
         const normalized = this.normalizeParams(args);
-        const { query, type, obs_type, concepts, files, ...options } = normalized;
+        const { query, type, obs_type, concepts, files, format, ...options } = normalized;
         let observations: ObservationSearchResult[] = [];
         let sessions: SessionSummarySearchResult[] = [];
         let prompts: UserPromptSearchResult[] = [];
@@ -200,6 +200,17 @@ export class SearchManager {
 
         const totalResults = observations.length + sessions.length + prompts.length;
 
+        // JSON format: return raw data for programmatic access (e.g., export scripts)
+        if (format === 'json') {
+          return {
+            observations,
+            sessions,
+            prompts,
+            totalResults,
+            query: query || ''
+          };
+        }
+
         if (totalResults === 0) {
           return {
             content: [{