fix dispatch session identity propagation

src/main/runtime/orchestration/db/dispatch-context/dispatch-context-store.ts

@@ -15,6 +15,7 @@ export function createDispatchContext(
   params: {
     taskId: string
     assigneeHandle: string
+    assigneeAgentSessionId?: string | null
     // Why: pane key is the remint-stable identity behind the handle — lets worker_done ownership survive handle reissue.
     assigneePaneKey?: string
     launchTokenHash?: string
@@ -64,6 +65,7 @@ export function createDispatchContext(
       contractVersion: CURRENT_CONTRACT_VERSION,
       launchTokenHash: launchTokenHash ?? null,
       assigneeHandle,
+      assigneeAgentSessionId: params.assigneeAgentSessionId,
       assigneePaneKey: assigneePaneKey ?? null,
       processIncarnation: processIncarnation ?? null,
       creatorDispatchId,

src/main/runtime/orchestration/db/dispatch-row-writer.ts

@@ -18,7 +18,7 @@ export const DISPATCH_CONTEXT_CLAIM_SQL = `INSERT INTO dispatch_contexts (
   creator_dispatch_id, creator_handle, creator_pane_key,
   status, failure_count, depth, dispatched_at
 )
-SELECT ?, run_id, id, ?, ?, ?, ?, ?, ?, ?, ?, 'dispatched', ?, ?, datetime('now')
+SELECT ?, run_id, id, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'dispatched', ?, ?, datetime('now')
 FROM tasks
 WHERE id = ? AND status = 'ready'
   AND NOT EXISTS (
@@ -99,7 +99,6 @@ export function claimDispatchContextRow(
       params.depth,
       params.taskId,
       params.assigneeHandle,
-      params.assigneeAgentSessionId ?? null,
       params.assigneePaneKey,
       params.assigneePaneKey,
       params.paneSuffix,