Start work on storing notifications in the database

Cargo.lock

@@ -6403,6 +6403,7 @@ dependencies = [
  "serde_derive",
  "smol",
  "smol-timeout",
+ "strum",
  "tempdir",
  "tracing",
  "util",
@@ -6623,6 +6624,12 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ffc183a10b4478d04cbbbfc96d0873219d962dd5accaff2ffbd4ceb7df837f4"
+
 [[package]]
 name = "rustybuzz"
 version = "0.3.0"
@@ -7698,6 +7705,22 @@ name = "strum"
 version = "0.25.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "290d54ea6f91c969195bdbcd7442c8c2a2ba87da8bf60a7ee86a235d4bc1e125"
+dependencies = [
+ "strum_macros",
+]
+
+[[package]]
+name = "strum_macros"
+version = "0.25.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad8d03b598d3d0fff69bf533ee3ef19b8eeb342729596df84bcc7e1f96ec4059"
+dependencies = [
+ "heck 0.4.1",
+ "proc-macro2",
+ "quote",
+ "rustversion",
+ "syn 2.0.37",
+]
 
 [[package]]
 name = "subtle"