Initial implementation of db stuffs

Got the migrations and datastructures in. Next step is building db
utility function into the db module or client module

Cargo.lock

@@ -229,6 +229,7 @@ dependencies = [
  "ctrlc-async",
  "diesel",
  "diesel-async",
+ "diesel-derive-composite",
  "fedichat",
  "quinn",
  "rmp-serde",
@@ -246,6 +247,15 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6ef517f0926dd24a1582492c791b6a4818a4d94e789a334894aa15b0d12f55c"
 
+[[package]]
+name = "convert_case"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baaaa0ecca5b51987b9423ccdc971514dd8b0bb7b4060b983d3664dad3f1f89f"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.10.1"
@@ -390,6 +400,18 @@ dependencies = [
  "tokio-postgres",
 ]
 
+[[package]]
+name = "diesel-derive-composite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a634241e758e588c8deb76cc44f0b605b46536aa769946446b6afd4956c7f2e8"
+dependencies = [
+ "convert_case",
+ "darling",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "diesel_derives"
 version = "2.3.9"
@@ -1778,6 +1800,12 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7df058c713841ad818f1dc5d3fd88063241cc61f49f5fbea4b951e8cf5a8d71d"
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9629274872b2bfaf8d66f5f15725007f635594914870f65218920345aa11aa8c"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.6"