drop ulid dependency

...and use v7 UUIDs exclusively. It's useful to have the timestamp in
request ids in particular, and no reason we _need_ v4 anywhere.

server/Cargo.lock

@@ -1256,7 +1256,6 @@ dependencies = [
  "tempfile",
  "tokio",
  "tracing",
- "ulid",
  "url",
  "uuid",
 ]
@@ -1272,6 +1271,7 @@ dependencies = [
  "byteorder",
  "bytes",
  "cursive",
+ "data-encoding",
  "flate2",
  "futures",
  "h264-reader",
@@ -1314,7 +1314,6 @@ dependencies = [
  "tracing-log",
  "tracing-subscriber",
  "tracing-test",
- "ulid",
  "url",
  "uuid",
  "walkdir",
@@ -2547,16 +2546,6 @@ version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
 
-[[package]]
-name = "ulid"
-version = "1.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f294bff79170ed1c5633812aff1e565c35d993a36e757f9bc0accf5eec4e6045"
-dependencies = [
- "rand",
- "web-time",
-]
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.15"
@@ -2618,6 +2607,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b3758f5e68192bb96cc8f9b7e2c2cfdabb435499a28499a42f8f984092adad4b"
 dependencies = [
  "getrandom",
+ "rand",
  "serde",
 ]
 
@@ -2745,16 +2735,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "web-time"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]
-
 [[package]]
 name = "which"
 version = "4.4.2"