Import upstream v0.16.22, stripped

Upstream commit: 474dd0229cb20cf513036619781ed97bd8073c3f
Enterprise-only files removed or emptied: 63
Enterprise-only snippets removed: 117 in 50 files
Dangling module declarations removed: 5
Cargo edits turning enterprise off: 14
Verification: clean
Enterprise feature gates left for rebuilt features: 19 in 18 files

Produced by tools/fork/strip.py. The full report is in docs/fork/strip-reports/ on main.

tests/docker/scripts/init-minio.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+# Wait for MinIO to be ready
+echo "Waiting for MinIO..."
+until mc alias set local http://minio:9000 minioadmin minioadmin 2>/dev/null; do
+  sleep 1
+done
+
+# Create the stalwart bucket
+mc mb local/stalwart --ignore-existing
+echo "MinIO bucket 'stalwart' created."