refactor!: Make metrics raw atomics, remove prometheus_client dependency

.github/workflows/ci.yaml

@@ -157,7 +157,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Install sccache
-        uses: mozilla-actions/[email protected].7
+        uses: mozilla-actions/[email protected].9
 
       - name: Setup Environment (PR)
         if: ${{ github.event_name == 'pull_request' }}
@@ -189,7 +189,7 @@ jobs:
     - uses: dtolnay/rust-toolchain@stable
       with:
         components: rustfmt
-    - uses: mozilla-actions/[email protected].7
+    - uses: mozilla-actions/[email protected].9
     - uses: taiki-e/install-action@cargo-make
     - run: cargo make format-check
 
@@ -206,7 +206,7 @@ jobs:
       with:
         toolchain: nightly-2024-11-30
     - name: Install sccache
-      uses: mozilla-actions/[email protected].7
+      uses: mozilla-actions/[email protected].9
 
     - name: Docs
       run: cargo doc --workspace --all-features --no-deps --document-private-items
@@ -225,7 +225,7 @@ jobs:
       with:
         components: clippy
     - name: Install sccache
-      uses: mozilla-actions/[email protected].7
+      uses: mozilla-actions/[email protected].9
 
     # TODO: We have a bunch of platform-dependent code so should
     #    probably run this job on the full platform matrix
@@ -252,7 +252,7 @@ jobs:
       with:
         toolchain: ${{ env.MSRV }}
     - name: Install sccache
-      uses: mozilla-actions/[email protected].7
+      uses: mozilla-actions/[email protected].9
 
     - name: Check MSRV all features
       run: |

.github/workflows/docs.yaml

@@ -34,7 +34,7 @@ jobs:
       with:
         toolchain: nightly-2024-11-30
     - name: Install sccache
-      uses: mozilla-actions/[email protected].7
+      uses: mozilla-actions/[email protected].9
 
     - name: Generate Docs
       run: cargo doc --workspace --all-features --no-deps

.github/workflows/tests.yaml

@@ -69,7 +69,7 @@ jobs:
         tool: nextest
 
     - name: Install sccache
-      uses: mozilla-actions/[email protected].7
+      uses: mozilla-actions/[email protected].9
 
     - name: Select features
       run: |
@@ -202,7 +202,7 @@ jobs:
         }
 
     - name: Install sccache
-      uses: mozilla-actions/[email protected].7
+      uses: mozilla-actions/[email protected].9
 
     - uses: msys2/setup-msys2@v2
 

Cargo.toml

@@ -30,13 +30,12 @@ unexpected_cfgs = { level = "warn", check-cfg = ["cfg(iroh_docsrs)"] }
 unused-async = "warn"
 
 [dependencies]
-serde = { version = "1", features = ["derive"] }
+iroh-metrics-derive = { path = "./iroh-metrics-derive", version = "0.1.0" }
+itoa = "1"
+serde = { version = "1", features = ["derive", "rc"] }
 thiserror = "2.0.6"
 tracing = "0.1"
 
-# metrics feature
-prometheus-client = { version = "0.22", optional = true }
-
 # static_core feature
 erased_set = { version = "0.8", optional = true }
 
@@ -47,19 +46,15 @@ hyper-util = { version = "0.1.1", features = ["tokio"], optional = true }
 reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"], optional = true }
 tokio = { version = "1", features = ["rt", "net", "fs"], optional = true }
 
-# derive feature
-iroh-metrics-derive = { path = "./iroh-metrics-derive", version = "0.1.0" }
-
 [dev-dependencies]
+postcard = { version = "1.1.1", features = ["use-std"] }
 tokio = { version = "1", features = ["io-util", "sync", "rt", "net", "fs", "macros", "time", "test-util"] }
 
 [features]
 default = ["metrics"]
 # Enables counters and other metrics being tracked.
 # If disabled, all counters return 0. Macros like `inc!` will do nothing.
-metrics = [
-    "dep:prometheus-client",
-]
+metrics = []
 # Enables functionality to run a local metrics server that current metrics
 # are served at in prometheus format.
 # Pulls in quite a few libraries to make exposing an HTTP server possible.