refactor(types): regenerate database types from canonical schema; drop TODO(types) join casts

Regenerate types/database.ts from a local Supabase built from the canonical
scripts/schema.sql. The running dev DB was stale (missing the 'stripe'
payment_platform value, members_with_permission, spaces.host_requires_card,
payments.link_status, dues_payment_methods.space_id), so it was rebuilt from
schema.sql first.

With real relationship metadata the 11 `as unknown as … // TODO(types)` join
casts are no longer needed:
- me portal, session-attendance, member-certifications, equipment-reservations:
  narrow the action result with `'data' in res` instead of a blanket cast.
- stripe / door embeds read the now-typed relation directly.
- completeSession + listEquipmentReservations route the embedded-select query
  through the fully-typed createClient() rather than the wide ServerSupabase gate
  client (the pattern documented in auth-helpers.ts); equipment disambiguates its
  two space_members FKs with an explicit !fkey hint.

Collapse the hand-maintained governance rows/enums in types/domain/governance.ts
into Tables<>/Enums<> aliases.

Tighten duesPaymentMethodSchema.platform to the DUES_LINK_PLATFORMS literal union
(the old `as unknown as [string,...]` erased it), which the now-correct
payment_platform enum requires.

The hand-added class_signup_tx / class_cancel_tx RPC entries are now generated
natively.

typecheck 0 · lint 0 errors · 645 tests · build ok

components/certifications/member-certifications-dialog.tsx

@@ -68,8 +68,7 @@ export function MemberCertificationsDialog({
     if ('error' in g && g.error) {
       toast.error(g.error)
     } else {
-      // TODO(types): remove after regenerating types/database.ts (missing FK relationship metadata)
-      setGrants(((g as unknown as { data: Grant[] }).data) ?? [])
+      setGrants(('data' in g ? g.data : []) ?? [])
     }
     if (!('error' in t) || !t.error) {
       setTypes(((t as { data: CertType[] }).data ?? []).filter(c => c.is_active))

components/classes/session-attendance.tsx

@@ -35,8 +35,7 @@ export function SessionAttendance({
       toast.error(res.error)
       return
     }
-    // TODO(types): remove after regenerating types/database.ts (missing FK relationship metadata)
-    setRows(((res as unknown as { data: Signup[] }).data) ?? [])
+    setRows(('data' in res ? res.data : []) ?? [])
   }, [sessionId])
 
   useEffect(() => {

components/equipment/equipment-reservations.tsx

@@ -33,8 +33,7 @@ export function EquipmentReservations({ equipmentId }: { equipmentId: string })
       toast.error(res.error)
       return
     }
-    // TODO(types): remove after regenerating types/database.ts (missing FK relationship metadata)
-    setRows(((res as unknown as { data: Reservation[] }).data) ?? [])
+    setRows(('data' in res ? res.data : []) ?? [])
   }, [equipmentId])
 
   useEffect(() => {