refactor: add table primitive and migrations by date; feat: add mcp connectors

backend/migrations/20260613_05_workflows_overview_rpc.sql

@@ -0,0 +1,75 @@
+-- Migration date: 2026-06-13
+
+-- Workflows overview read model.
+-- Returns owned and shared workflows in one database call.
+
+create or replace function public.get_workflows_overview(
+  p_user_id text,
+  p_user_email text default null,
+  p_type text default null
+)
+returns table (
+  id uuid,
+  user_id text,
+  title text,
+  type text,
+  prompt_md text,
+  columns_config jsonb,
+  practice text,
+  is_system boolean,
+  created_at timestamptz,
+  allow_edit boolean,
+  is_owner boolean,
+  shared_by_name text
+)
+language sql
+stable
+as $$
+  with owned as (
+    select
+      w.*,
+      true as allow_edit,
+      true as is_owner,
+      null::text as shared_by_name,
+      0 as sort_bucket
+    from public.workflows w
+    where w.user_id = p_user_id
+      and w.is_system = false
+      and (p_type is null or w.type = p_type)
+  ),
+  shared as (
+    select
+      w.*,
+      ws.allow_edit,
+      false as is_owner,
+      nullif(trim(up.display_name), '') as shared_by_name,
+      1 as sort_bucket
+    from public.workflow_shares ws
+    join public.workflows w
+      on w.id = ws.workflow_id
+    left join public.user_profiles up
+      on up.user_id::text = ws.shared_by_user_id
+    where lower(ws.shared_with_email) = lower(coalesce(p_user_email, ''))
+      and (p_type is null or w.type = p_type)
+  ),
+  visible_workflows as (
+    select * from owned
+    union all
+    select * from shared
+  )
+  select
+    vw.id,
+    vw.user_id,
+    vw.title,
+    vw.type,
+    vw.prompt_md,
+    vw.columns_config,
+    vw.practice,
+    vw.is_system,
+    vw.created_at,
+    vw.allow_edit,
+    vw.is_owner,
+    vw.shared_by_name
+  from visible_workflows vw
+  order by vw.sort_bucket asc, vw.created_at desc;
+$$;