Add multi-tenant cloud mode: self-serve purchase, credit metering, core-decoupling

Introduces RECAP_MODE=multi alongside single-mode self-host:
- Tenant auth + accounts (magic-link via System SMTP), per-tenant credit pool,
  anonymous trial minting with per-IP/-64 caps
- Self-serve Pro/Max purchase: inline Lightning (BTCPay) + card (Zaprite),
  prepaid 30-day periods, expiry-reminder emails
- Core-decoupling: relay owns cloud tier/expiry keyed by Recaps user-id
- SQLite (better-sqlite3) schema for multi-mode; filesystem unchanged for single
- StartOS actions/versions through 0.2.155

startos/versions/v0.2.111.ts

@@ -0,0 +1,13 @@
+import { VersionInfo } from '@start9labs/start-sdk'
+
+export const v_0_2_111 = VersionInfo.of({
+  version: '0.2.111:0',
+  releaseNotes: {
+    en_US:
+      "Phase 1 diagnostics. Adds two visibility aids to help confirm the inline-Lightning path is active end-to-end. (1) Console.log on every /api/credits/buy response — prints the raw envelope plus a one-line 'bolt11 present: yes/NO' marker so you can confirm at a glance whether the relay is surfacing the new field. (2) Admin-only diagnostic line on the legacy-fallback polling view that explicitly says 'Inline payment unavailable — relay didn't return a BOLT11' with the version requirement (relay v0.2.71+). Both are admin/operator-only — regular tenants don't see the diagnostic line. Will be removed once we've confirmed the inline path works for every BTCPay store configuration.",
+  },
+  migrations: {
+    up: async ({ effects }) => {},
+    down: async ({ effects }) => {},
+  },
+})