abstract duration parsing into utils

Signed-off-by: Jason Volk <jason@zemos.net>

Cargo.lock

@@ -692,6 +692,7 @@ dependencies = [
  "conduit_macros",
  "const-str",
  "ctor",
+ "cyborgtime",
  "either",
  "figment",
  "hardened_malloc-rs",
@@ -790,7 +791,6 @@ dependencies = [
  "conduit_core",
  "conduit_database",
  "const-str",
- "cyborgtime",
  "futures-util",
  "hickory-resolver",
  "http",