refactor: remove dc_ prefix

* refactor: remove `dc_` prefix from mods

* refactor: remove dc_ prefix from functions

* fix: avoid temporary `File`s to avoid race conditions

* test(pgp): fix runtime usage in Lazy

Based on #3462

* fixup: undo some comment changes

Author: dignifiedquire

Cargo.lock

@@ -89,6 +89,7 @@ log = "0.4"
 pretty_env_logger = "0.4"
 proptest = { version = "1", default-features = false, features = ["std"] }
 tempfile = "3"
+tokio = { version = "1", features = ["parking_lot", "rt-multi-thread", "macros"] }
 
 [workspace]
 members = [