feat(analytics): build-time bake + telemetry depth (#336)

Bake PostHog + Sentry into the published Docker image (SNAPOTTER_ANALYTICS
build arg, codegen script). Delete entire consent system. Move event emission
to BullMQ worker. Add cross-tier identity stitching, Sentry performance
tracing on both tiers, frontend funnel events. Fix stateful regex bug.

86 files changed, 1593 insertions(+), 3747 deletions(-)

packages/shared/src/analytics/baked.ts

@@ -0,0 +1,8 @@
+// AUTO-GENERATED by scripts/bake-analytics.mjs -- do not edit manually
+export const ANALYTICS_BAKED = {
+  enabled: false,
+  posthogApiKey: "",
+  posthogHost: "",
+  sentryDsn: "",
+  sampleRate: 0,
+} as const;