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/dav-proto/Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "dav-proto"
+version = "0.16.22"
+edition = "2024"
+
+[dependencies]
+trc = { path = "../trc" }
+types = { path = "../types" }
+hashify = "0.2.9"
+quick-xml = "0.41"
+calcard = { version = "0.3", features = ["rkyv"] }
+mail-parser = { version = "0.11", features = ["full_encoding", "rkyv"] }
+hyper = "1.11.1"
+chrono = { version = "0.4.45", features = ["serde"], optional = true }
+compact_str = "0.10.0"
+
+[dev-dependencies]
+calcard = { version = "0.3", features = ["serde", "rkyv"] }
+types = { path = "../types", features = ["test_mode"] }
+serde = { version = "1.0.229", features = ["derive"] }
+serde_json = "1.0.151"
+chrono = { version = "0.4.45", features = ["serde"] }
+
+[features]
+test_mode = ["chrono"]
+enterprise = []
+
+[lints]
+workspace = true