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.

crates/registry/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "registry"
+version = "0.16.22"
+edition = "2024"
+
+[dependencies]
+utils = { path =  "../utils" }
+trc = { path = "../trc" }
+types = { path = "../types" }
+serde = { version = "1.0", features = ["derive"]}
+hashify = "0.2.9"
+ahash = { version = "0.8" }
+jmap-tools = { version = "0.1" }
+mail-auth = { version = "0.13" }
+tokio = { version = "1.53", features = ["fs"] }
+lz4_flex = { version = "0.14", features = ["alloc"], default-features = false }
+
+[features]
+test_mode = []
+enterprise = []
+
+[lints]
+workspace = true