fix(session): Semantic renaming and memory session ID capture for resume

This commit fixes the session ID confusion identified in PR #475:

PROBLEM:
- Using contentSessionId (user's Claude Code session) for SDK resume was wrong
- Memory agent conversation should persist across the entire user session
- Each SDK call was starting fresh, losing memory agent continuity

SOLUTION:
1. Semantic Renaming (clarity):
   - claudeSessionId → contentSessionId (user's observed session)
   - sdkSessionId → memorySessionId (memory agent's session for resume)
   - Database migration 17 renames columns accordingly

2. Memory Session ID Capture:
   - SDKAgent captures session_id from first SDK message
   - Persists to database via updateMemorySessionId()
   - SessionManager loads memorySessionId on session init

3. Resume Logic Fixed:
   - Only resume if memorySessionId captured from previous interaction
   - Enables memory agent continuity across user prompts

Files changed: 33 (types, database, agents, hooks, routes)

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

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

src/services/worker/http/routes/DataRoutes.ts

@@ -158,18 +158,18 @@ export class DataRoutes extends BaseRouteHandler {
   /**
    * Get SDK sessions by SDK session IDs
    * POST /api/sdk-sessions/batch
-   * Body: { sdkSessionIds: string[] }
+   * Body: { memorySessionIds: string[] }
    */
   private handleGetSdkSessionsByIds = this.wrapHandler((req: Request, res: Response): void => {
-    const { sdkSessionIds } = req.body;
+    const { memorySessionIds } = req.body;
 
-    if (!Array.isArray(sdkSessionIds)) {
-      this.badRequest(res, 'sdkSessionIds must be an array');
+    if (!Array.isArray(memorySessionIds)) {
+      this.badRequest(res, 'memorySessionIds must be an array');
       return;
     }
 
     const store = this.dbManager.getSessionStore();
-    const sessions = store.getSdkSessionsBySessionIds(sdkSessionIds);
+    const sessions = store.getSdkSessionsBySessionIds(memorySessionIds);
     res.json(sessions);
   });