feat(haproxy): add initial implementation for HAProxy log ingestion

rust/haproxy_ingest_proto/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "haproxy-ingest-proto"
+version = "0.1.0"
+edition = "2024"
+description = "Shared protocol types and limits for HAProxy ingestion"
+license = "MIT"
+build = "build.rs"
+
+[lints]
+workspace = true
+
+[dependencies]
+prost.workspace = true
+
+[build-dependencies]
+prost-build.workspace = true
+protoc-bin-vendored.workspace = true