feat(SessionStore): auto-create session records if missing

- Added functionality to automatically create a session record in the database if it does not exist when storing observations or session summaries.
- Updated `storeObservation` and `storeSummary` methods to include checks for existing session records and insert new records as needed.
- Added logging for auto-created session records for better traceability.

plugin/scripts/search-server.js

@@ -415,11 +415,23 @@ ${e.stack}`:e.message;if(Array.isArray(e))return`[${e.length} items]`;let t=Obje
       (claude_session_id, prompt_number, prompt_text, created_at, created_at_epoch)
       VALUES (?, ?, ?, ?, ?)
     `).run(e,t,s,r.toISOString(),n).lastInsertRowid}storeObservation(e,t,s,r){let n=new Date,i=n.getTime();this.db.prepare(`
+      SELECT id FROM sdk_sessions WHERE sdk_session_id = ?
+    `).get(e)||(this.db.prepare(`
+        INSERT INTO sdk_sessions
+        (claude_session_id, sdk_session_id, project, started_at, started_at_epoch, status)
+        VALUES (?, ?, ?, ?, ?, 'active')
+      `).run(e,e,t,n.toISOString(),i),console.error(`[SessionStore] Auto-created session record for session_id: ${e}`)),this.db.prepare(`
       INSERT INTO observations
       (sdk_session_id, project, type, title, subtitle, facts, narrative, concepts,
        files_read, files_modified, prompt_number, created_at, created_at_epoch)
       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
     `).run(e,t,s.type,s.title,s.subtitle,JSON.stringify(s.facts),s.narrative,JSON.stringify(s.concepts),JSON.stringify(s.files_read),JSON.stringify(s.files_modified),r||null,n.toISOString(),i)}storeSummary(e,t,s,r){let n=new Date,i=n.getTime();this.db.prepare(`
+      SELECT id FROM sdk_sessions WHERE sdk_session_id = ?
+    `).get(e)||(this.db.prepare(`
+        INSERT INTO sdk_sessions
+        (claude_session_id, sdk_session_id, project, started_at, started_at_epoch, status)
+        VALUES (?, ?, ?, ?, ?, 'active')
+      `).run(e,e,t,n.toISOString(),i),console.error(`[SessionStore] Auto-created session record for session_id: ${e}`)),this.db.prepare(`
       INSERT INTO session_summaries
       (sdk_session_id, project, request, investigated, learned, completed,
        next_steps, notes, prompt_number, created_at, created_at_epoch)