Import upstream v0.16.24, stripped

Upstream commit: af37a234981722493b74623a983581691d2b70b6
Enterprise-only files removed or emptied: 63
Enterprise-only snippets removed: 118 in 50 files
Dangling module declarations removed: 5
Edits turning enterprise off: 25
Third-party code: 14 files, 0 not in THIRD-PARTY.md
Renamed identifiers: 62 in 18 files
Verification: clean

The same Enterprise footprint as v0.16.23. The build check fails only on
tests/src/directory/issuer.rs, unchanged since v0.16.23: it calls a helper
from upstream's Enterprise-only OIDC test, and tests issuer-based directory
routing, an Enterprise feature. main has never carried it.

crates/jmap/src/registry/mapping/bootstrap.rs

@@ -639,6 +639,7 @@ fn map_dns_server(dns_server: &DnsServerBootstrap) -> Option<registry::schema::s
         DnsServerBootstrap::Ns1(inner) => DnsServer::Ns1(inner.clone()).into(),
         DnsServerBootstrap::OracleCloud(inner) => DnsServer::OracleCloud(inner.clone()).into(),
         DnsServerBootstrap::Plesk(inner) => DnsServer::Plesk(inner.clone()).into(),
+        DnsServerBootstrap::PowerDns(inner) => DnsServer::PowerDns(inner.clone()).into(),
         DnsServerBootstrap::Safedns(inner) => DnsServer::Safedns(inner.clone()).into(),
         DnsServerBootstrap::Scaleway(inner) => DnsServer::Scaleway(inner.clone()).into(),
         DnsServerBootstrap::TencentCloud(inner) => DnsServer::TencentCloud(inner.clone()).into(),
@@ -677,7 +678,7 @@ fn build_default_bootstrap(server: &Server) -> Bootstrap {
         directory: DirectoryBootstrap::Internal,
         tracer: Tracer::Log(TracerLog {
             path: "/var/log/stalwart/".to_string(),
-            prefix: "stalwart".to_string(),
+            prefix: "inbuxa".to_string(),
             ansi: true,
             enable: true,
             ..Default::default()