chore: simplify signer dependency and documentate http features configuration

Author: Alenar

Cargo.lock

@@ -1,3 +1,39 @@
 # Mithril-aggregator-client [![CI workflow](https://github.com/input-output-hk/mithril/actions/workflows/ci.yml/badge.svg)](https://github.com/input-output-hk/mithril/actions/workflows/ci.yml) [![License](https://img.shields.io/badge/license-Apache%202.0-blue?style=flat-square)](https://github.com/input-output-hk/mithril/blob/main/LICENSE) [![Discord](https://img.shields.io/discord/500028886025895936.svg?logo=discord&style=flat-square)](https://discord.gg/5kaErDKDRq)
 
-This crate provides a client to request data from a Mithril Aggregator.
+This crate provides a client to request data from a Mithril Aggregator over http.
+
+## Configuration of http features
+
+Reqwest is used as the backend for the http client. Its default features are disabled to let the user control
+which [features to enable](https://docs.rs/reqwest/latest/reqwest/#optional-features).
+
+To enable a reqwest feature, add the following to your `Cargo.toml`:
+
+```toml
+reqwest = { version = "x.yy", features = ["feature_a", "feature_b"] }
+```
+
+for example, if reqwest is a workspace dependency, and you want to enable the `default` feature and the compression features:
+
+```toml
+reqwest = { workspace = true, features = [
+    "default",
+    "gzip",
+    "zstd",
+    "deflate",
+    "brotli"
+] }
+```
+
+### Unused dependency warning
+
+You should add the `reqwest` dependency even if you don't use it directly in your code.
+If you are using [`cargo machete`](https://github.com/bnjbvr/cargo-machete) to track unused dependencies, it will raise a warning.
+
+To avoid this warning, add the following to your `Cargo.toml`:
+
+```toml
+[package.metadata.cargo-machete]
+# reqwest: for features configuration, indirect dependency via `mithril-aggregator-client`
+ignored = ["reqwest"]
+```

internal/mithril-aggregator-client/README.md

@@ -9,6 +9,10 @@ homepage = { workspace = true }
 license = { workspace = true }
 repository = { workspace = true }
 
+[package.metadata.cargo-machete]
+# reqwest: for features configuration, indirect dependency via `mithril-aggregator-client`
+ignored = ["reqwest"]
+
 [features]
 default = ["jemallocator"]
 
@@ -46,7 +50,6 @@ reqwest = { workspace = true, features = [
     "deflate",
     "brotli"
 ] }
-semver = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 slog = { workspace = true, features = [
@@ -64,7 +67,6 @@ tikv-jemallocator = { version = "0.6.0", optional = true }
 
 [dev-dependencies]
 criterion = { version = "0.7.0", features = ["html_reports", "async_tokio"] }
-http = "1.3.1"
 httpmock = "0.8.1"
 mockall = { workspace = true }
 prometheus-parse = "0.2.5"