Add Image and Video total gauges

Cargo.lock

@@ -1160,9 +1160,11 @@ dependencies = [
  "hmac",
  "image",
  "jsonwebtoken",
+ "lazy_static",
  "log",
  "notify",
  "path-absolutize",
+ "prometheus",
  "rayon",
  "serde",
  "serde_json",
@@ -1753,10 +1755,17 @@ dependencies = [
  "fnv",
  "lazy_static",
  "parking_lot",
+ "protobuf",
  "regex",
  "thiserror",
 ]
 
+[[package]]
+name = "protobuf"
+version = "2.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45604fc7a88158e7d514d8e22e14ac746081e7a70d7690074dd0029ee37458d6"
+
 [[package]]
 name = "quick-error"
 version = "1.2.3"