WeKnora deployment source with the reviewed wiki identity, summary and recovery fixes

migrations/versioned/000051_custom_agents_creator_backfill.up.sql

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+-- Migration: 000051_custom_agents_creator_backfill
+-- Backfill custom_agents.created_by for legacy non-builtin rows.
+--
+-- Background:
+--   * `custom_agents.created_by` was introduced together with the table in
+--     000006 but the seed INSERT statements for the two built-in agents
+--     (builtin-quick-answer / builtin-smart-reasoning) intentionally omit
+--     this column — built-ins are tenant-shared system rows, so they
+--     legitimately carry NULL / empty creator_id. `AgentCreatorLookup`
+--     short-circuits on IsBuiltin=true and treats this as expected.
+--   * The RBAC migration 000043 backfilled `knowledge_bases.creator_id`
+--     to the tenant owner so Contributors keep "owner" access to legacy
+--     KBs they actually created, but it forgot the symmetrical update on
+--     `custom_agents`. As a result any non-builtin agent created before
+--     the per-row creator tracking landed (or written by tooling that
+--     skipped UserIDFromContext) has empty `created_by` and falls into
+--     the "tenant-owned, Admin+ only" bucket — the historical creator
+--     can no longer self-edit, and the `?creator=mine|others` list
+--     filter silently drops the row.
+--
+-- This migration applies the same owner-of-tenant fallback as
+-- knowledge_bases, scoped strictly to non-builtin rows so the
+-- intentional empty creator on built-in agents is preserved.
+DO $$ BEGIN RAISE NOTICE '[Migration 000051] Backfilling custom_agents.created_by'; END $$;
+
+UPDATE custom_agents ca
+   SET created_by = (
+       SELECT tm.user_id
+         FROM tenant_members tm
+        WHERE tm.tenant_id = ca.tenant_id
+          AND tm.role = 'owner'
+          AND tm.status = 'active'
+          AND tm.deleted_at IS NULL
+        ORDER BY tm.joined_at ASC, tm.id ASC
+        LIMIT 1
+   )
+ WHERE ca.is_builtin = FALSE
+   AND (ca.created_by IS NULL OR ca.created_by = '')
+   AND EXISTS (
+       SELECT 1
+         FROM tenant_members tm
+        WHERE tm.tenant_id = ca.tenant_id
+          AND tm.role = 'owner'
+          AND tm.status = 'active'
+          AND tm.deleted_at IS NULL
+   );
+
+DO $$ BEGIN RAISE NOTICE '[Migration 000051] custom_agents.created_by backfill complete'; END $$;