Add managed Alpaca pool

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

backend/Cargo.lock

@@ -184,9 +184,12 @@ name = "backend"
 version = "0.1.0"
 dependencies = [
  "apca",
+ "async-trait",
  "axum",
  "deadpool",
  "dotenv",
+ "futures",
+ "futures-util",
  "log",
  "log4rs",
  "serde",
@@ -194,6 +197,8 @@ dependencies = [
  "sqlx",
  "time 0.3.28",
  "tokio",
+ "tungstenite 0.20.0",
+ "websocket-util",
 ]
 
 [[package]]
@@ -386,6 +391,12 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "data-encoding"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2e66c9d817f1720209181c316d28635c050fa304f9c79e47a520882661b7308"
+
 [[package]]
 name = "deadpool"
 version = "0.9.5"
@@ -588,6 +599,7 @@ checksum = "23342abe12aba583913b2e62f22225ff9c950774065e4bfb61a19cd9770fec40"
 dependencies = [
  "futures-channel",
  "futures-core",
+ "futures-executor",
  "futures-io",
  "futures-sink",
  "futures-task",
@@ -2142,7 +2154,7 @@ dependencies = [
  "native-tls",
  "tokio",
  "tokio-native-tls",
- "tungstenite",
+ "tungstenite 0.18.0",
 ]
 
 [[package]]
@@ -2242,6 +2254,25 @@ dependencies = [
  "utf-8",
 ]
 
+[[package]]
+name = "tungstenite"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e862a1c4128df0112ab625f55cd5c934bcb4312ba80b39ae4b4835a3fd58e649"
+dependencies = [
+ "byteorder",
+ "bytes",
+ "data-encoding",
+ "http",
+ "httparse",
+ "log",
+ "rand",
+ "sha1",
+ "thiserror",
+ "url",
+ "utf-8",
+]
+
 [[package]]
 name = "typemap-ors"
 version = "1.0.0"