fix(sqlite): add missing agent fields to scanIssues and related queries (#1176)

The scanIssues() function and multiple SQL queries were not selecting or
scanning agent-related fields (hook_bead, role_bead, agent_state, last_activity,
role_type, rig, mol_type) and time-based scheduling fields (due_at, defer_until).

This caused bd list --json to return null for last_activity even when the
database contained valid timestamps, preventing proper agent health monitoring.

Updated files:
- dependencies.go: scanIssues() variable declarations, scan calls, assignments
- queries.go: SearchIssues query
- labels.go: GetIssuesByLabel query
- ready.go: GetReadyWork and GetNewlyUnblockedByClose queries
- transaction.go: GetIssue query, SearchIssues query, scanIssueRow()

Fixes steveyegge/beads#1175

internal/storage/sqlite/ready.go

@@ -158,7 +158,9 @@ func (s *SQLiteStorage) GetReadyWork(ctx context.Context, filter types.WorkFilte
 		i.created_at, i.created_by, i.owner, i.updated_at, i.closed_at, i.external_ref, i.source_repo, i.close_reason,
 		i.deleted_at, i.deleted_by, i.delete_reason, i.original_type,
 		i.sender, i.ephemeral, i.pinned, i.is_template, i.crystallizes,
-		i.await_type, i.await_id, i.timeout_ns, i.waiters
+		i.await_type, i.await_id, i.timeout_ns, i.waiters,
+		i.hook_bead, i.role_bead, i.agent_state, i.last_activity, i.role_type, i.rig, i.mol_type,
+		i.due_at, i.defer_until
 		FROM issues i
 		WHERE %s
 		AND NOT EXISTS (
@@ -750,7 +752,9 @@ func (s *SQLiteStorage) GetNewlyUnblockedByClose(ctx context.Context, closedIssu
 		       i.created_at, i.created_by, i.owner, i.updated_at, i.closed_at, i.external_ref, i.source_repo, i.close_reason,
 		       i.deleted_at, i.deleted_by, i.delete_reason, i.original_type,
 		       i.sender, i.ephemeral, i.pinned, i.is_template, i.crystallizes,
-		       i.await_type, i.await_id, i.timeout_ns, i.waiters
+		       i.await_type, i.await_id, i.timeout_ns, i.waiters,
+		       i.hook_bead, i.role_bead, i.agent_state, i.last_activity, i.role_type, i.rig, i.mol_type,
+		       i.due_at, i.defer_until
 		FROM issues i
 		JOIN dependencies d ON i.id = d.issue_id
 		WHERE d.depends_on_id = ?