Add board thread interventions

AgentCompany-New/src/main/database/migrations/011-board-interventions.ts

@@ -0,0 +1,29 @@
+export const boardInterventionSchema = `
+  alter table chat_threads add column board_state text not null default 'open';
+  alter table chat_threads add column controlled_by_type text;
+  alter table chat_threads add column controlled_by_id text;
+
+  create table if not exists board_interventions (
+    id text primary key,
+    org_id text not null references organizations(id) on delete cascade,
+    thread_id text not null references chat_threads(id) on delete cascade,
+    message_id text not null references chat_messages(id) on delete cascade,
+    mode text not null,
+    action text not null,
+    details text not null,
+    target_type text,
+    target_id text,
+    approval_id text references approvals(id) on delete set null,
+    created_by_type text not null,
+    created_by_id text,
+    created_at text not null,
+    unique(message_id)
+  );
+
+  create index if not exists idx_board_interventions_org_thread on board_interventions(org_id, thread_id, created_at);
+  create index if not exists idx_board_interventions_message on board_interventions(message_id);
+  create index if not exists idx_chat_threads_org_board_state on chat_threads(org_id, board_state);
+
+  insert into schema_migrations(version, name, applied_at)
+  values (11, 'board_interventions', datetime('now'));
+`;