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

lib/actions/classes/sessions.ts

@@ -212,27 +212,8 @@ export async function listUpcomingSessions() {
     .order('starts_at', { ascending: true })
   if (error) return { error: error.message }
 
-  // TODO(types): remove after regenerating types/database.ts (missing FK relationship metadata)
-  const rows = ((sessions ?? []) as unknown as Array<{
-    id: string
-    class_id: string
-    starts_at: string
-    ends_at: string | null
-    location: string | null
-    capacity: number | null
-    status: string
-    notes: string | null
-    classes: {
-      title: string
-      description: string | null
-      payment_link: string | null
-      capacity: number | null
-      is_active: boolean
-      grants_certification_id: string | null
-      required_form_id: string | null
-    } | null
-  }>).filter(
-    (s: { classes?: { is_active?: boolean } | null }) => s.classes?.is_active !== false,
+  const rows = (sessions ?? []).filter(
+    (s) => s.classes?.is_active !== false,
   )
   const ids = rows.map((s: { id: string }) => s.id)