feat: Add free/exempt subscription status for organizations

- Add 'free' subscription status (exempt from fees)
- POST /admin/organizations/:id/set-free - Set org as free
- POST /admin/organizations/:id/remove-free - Remove free status
- Free orgs get enterprise plan, no expiry

src/middleware/subscription.ts

@@ -38,6 +38,11 @@ export async function subscriptionMiddleware(ctx: Context, next: Next): Promise<
   let message = "";
 
   switch (org.subscription_status) {
+    case "free":
+      // Exempt from fees - always active
+      isActive = true;
+      break;
+
     case "active":
       // Check if subscription has ended
       if (org.subscription_ends_at && new Date(org.subscription_ends_at) < now) {

src/routes/admin.ts

@@ -369,6 +369,49 @@ adminRouter.post("/organizations/:id/extend-trial", requireSuperAdmin, async (ct
   ctx.response.body = { message: `Trial um ${extendDays} Tage verlängert` };
 });
 
+// Set organization as free (exempt from fees)
+adminRouter.post("/organizations/:id/set-free", requireSuperAdmin, async (ctx) => {
+  const orgId = ctx.params.id;
+  const body = await ctx.request.body.json();
+  const { reason } = body;
+  
+  await execute(
+    `UPDATE organizations SET 
+       subscription_status = 'free',
+       subscription_plan = 'enterprise',
+       subscription_ends_at = NULL,
+       trial_ends_at = NULL,
+       subscription_paused_at = NULL,
+       subscription_pause_reason = NULL,
+       settings = settings || $1::jsonb
+     WHERE id = $2`,
+    [JSON.stringify({ free_reason: reason || "Freigestellt durch Admin", free_since: new Date().toISOString() }), orgId]
+  );
+  
+  ctx.response.body = { message: "Organisation freigestellt (kostenlos)" };
+});
+
+// Remove free status (back to trial or active)
+adminRouter.post("/organizations/:id/remove-free", requireSuperAdmin, async (ctx) => {
+  const orgId = ctx.params.id;
+  const body = await ctx.request.body.json();
+  const { set_trial_days } = body;
+  
+  const trialDays = set_trial_days || 14;
+  
+  await execute(
+    `UPDATE organizations SET 
+       subscription_status = 'trial',
+       subscription_plan = 'starter',
+       trial_ends_at = NOW() + INTERVAL '${trialDays} days',
+       settings = settings - 'free_reason' - 'free_since'
+     WHERE id = $1`,
+    [orgId]
+  );
+  
+  ctx.response.body = { message: `Freistellung aufgehoben, ${trialDays} Tage Trial gesetzt` };
+});
+
 // List all organizations with subscription info
 adminRouter.get("/subscriptions", requireSuperAdmin, async (ctx) => {
   const filter = ctx.request.url.searchParams.get("filter"); // all, trial, active, paused, expired