fix: disable http/2 (for now) (#17)

- disable HTTP/2 (we def. don't want it for authrpc, maybe could/should
enable it for rpc in the future,though)
- add metrics for in-flight requests counts
- enhanced/optimised logs
- don't proxy `transfer-encoding` header

Author: 0x416e746f6e

.cargo/config.toml

@@ -1,2 +1,4 @@
 [build]
-rustflags = ["--cfg", "tracing_unstable"]
+rustflags = [
+    "--cfg", "tracing_unstable",
+]

.github/workflows/rproxy_release.yaml

@@ -29,7 +29,7 @@ permissions:
 jobs:
   extract_version:
     name: extract version
-    runs-on: warp-ubuntu-latest-x64-16x
+    runs-on: ubuntu-latest
     outputs:
       VERSION: ${{ steps.extract_version.outputs.VERSION }}
     steps:
@@ -74,9 +74,9 @@ jobs:
       matrix:
         configs:
           - target: x86_64-unknown-linux-gnu
-            runner: warp-ubuntu-latest-x64-32x
+            runner: ubuntu-24.04
           - target: aarch64-unknown-linux-gnu
-            runner: warp-ubuntu-latest-arm64-32x
+            runner: ubuntu-24.04-arm
 
     steps:
       - name: install dependencies
@@ -113,7 +113,7 @@ jobs:
     name: draft release
     if: ${{ github.event.inputs.draft_release == 'true' || github.event_name == 'push' }}
     needs: [extract_version, build_binary]
-    runs-on: warp-ubuntu-latest-x64-16x
+    runs-on: ubuntu-latest
     env:
       VERSION: ${{ needs.extract_version.outputs.VERSION }}
     permissions:
@@ -172,9 +172,9 @@ jobs:
       matrix:
         configs:
           - platform: linux/amd64
-            runner: warp-ubuntu-latest-x64-16x
+            runner: ubuntu-24.04
           - platform: linux/arm64
-            runner: warp-ubuntu-latest-arm64-16x
+            runner: ubuntu-24.04-arm
     steps:
       - name: checkout sources
         uses: actions/checkout@v4
@@ -239,7 +239,7 @@ jobs:
 
   publish_container_index:
     name: publish container index
-    runs-on: warp-ubuntu-latest-x64-16x
+    runs-on: ubuntu-latest
     env:
       VERSION: ${{ needs.extract_version.outputs.VERSION }}
     needs: