-- Per-user tenancy: authenticate key/client id becomes an opaque tenant boundary.
-- Existing rows remain in the legacy unscoped tenant (NULL) for single-tenant installs.

alter table projects add column if not exists tenant_key text;
alter table thoughts add column if not exists tenant_key text;
alter table stored_files add column if not exists tenant_key text;
alter table learnings add column if not exists tenant_key text;
alter table plans add column if not exists tenant_key text;
alter table chat_histories add column if not exists tenant_key text;

-- Project names are now unique inside a tenant rather than globally.
alter table projects drop constraint if exists ukey_projects_name;
alter table projects drop constraint if exists projects_name_key;
drop index if exists projects_name_key;
create unique index if not exists projects_tenant_key_name_idx
    on projects (coalesce(tenant_key, ''), name);

create index if not exists projects_tenant_key_idx on projects (tenant_key);
create index if not exists thoughts_tenant_key_idx on thoughts (tenant_key);
create index if not exists thoughts_tenant_key_project_id_idx on thoughts (tenant_key, project_id);
create index if not exists stored_files_tenant_key_idx on stored_files (tenant_key);
create index if not exists learnings_tenant_key_idx on learnings (tenant_key);
create index if not exists plans_tenant_key_idx on plans (tenant_key);
create index if not exists chat_histories_tenant_key_idx on chat_histories (tenant_key);