fix: error-only Sentry telemetry, storm-proof capture, and crash fixes (#476)

Removes Sentry tracing entirely (BullMQ idle polling burned 4.8M transactions in 2 days at the baked 0.1 rate), decouples PostHog sampling, and replaces the type-only error scrub with a vetted-field sanitizer plus SafeError/ToolInputError contracts. One classified capture path with per-signature throttles and a per-process ceiling makes storms impossible (NODE-1E was 4,541 events from one 30s loop). Browser errors move to a dedicated web Sentry project with their own source maps. Adds the SNAPOTTER_TELEMETRY runtime kill switch and silences test fleets.

Crash fixes: remote 204/304 SSRF process kill (NODE-20), conversion-preset boot crash loop (NODE-21), Redis version preflight + unhandled subscribe rejection (NODE-1T), Sign PDF on plain-http origins (NODE-1K/1M), wavesurfer/pdf.js teardown rejections (NODE-1P/1N), bundle-import ZlibError to 400 (NODE-1Z), chart-maker input errors declassified (NODE-1H/1J), asset requests skip the session DB lookup (NODE-1D).

tests/unit/api/jobs/siem-forward.behavior.test.ts

@@ -5,6 +5,7 @@ const deliverWebhookMock = vi.hoisted(() => vi.fn());
 const upsertSettingMock = vi.hoisted(() => vi.fn());
 const decryptMock = vi.hoisted(() => vi.fn());
 const isEncryptedMock = vi.hoisted(() => vi.fn());
+const isFeatureEnabledMock = vi.hoisted(() => vi.fn());
 const selectMock = vi.hoisted(() => vi.fn());
 
 function queryChain<T>(result: T, terminalWhere = false) {
@@ -24,6 +25,8 @@ async function loadSiemForward() {
   upsertSettingMock.mockReset();
   decryptMock.mockReset();
   isEncryptedMock.mockReset();
+  isFeatureEnabledMock.mockReset();
+  isFeatureEnabledMock.mockReturnValue(true);
   selectMock.mockReset();
 
   vi.doMock("drizzle-orm", () => ({
@@ -75,6 +78,10 @@ async function loadSiemForward() {
     readSiemConfig: readSiemConfigMock,
   }));
 
+  vi.doMock("@snapotter/enterprise", () => ({
+    isFeatureEnabled: isFeatureEnabledMock,
+  }));
+
   return import("../../../../apps/api/src/jobs/siem-forward.js");
 }