feat!: migrate from prost to buffa for protobuf codegen

.gitattributes

@@ -0,0 +1,7 @@
+# Proto sources are sha256-hashed by the build.rs descriptor-freshness guards
+# (waproto, sqlite-storage wire, wacore voip tables). Force LF so a CRLF checkout
+# (Windows core.autocrlf=true) can't change the hash and trip a false "stale
+# descriptor" build error. The committed descriptors are binary.
+*.proto text eol=lf
+*.desc binary
+*.desc.sha256 text eol=lf

.github/workflows/main.yml

@@ -77,6 +77,12 @@ jobs:
         run: cargo build --workspace --exclude e2e-tests --all-targets --verbose
       - name: Run tests
         run: cargo test --workspace --exclude e2e-tests --verbose -- --nocapture
+      # waproto serde tests are feature-gated and produce zero tests under the
+      # default feature set, so exercise each representation explicitly.
+      - name: Test waproto serde (enum repr)
+        run: cargo test -p waproto --features serde-enum-repr --verbose
+      - name: Test waproto serde (snake_case)
+        run: cargo test -p waproto --features serde-snake-case --verbose
 
   test-all-features:
     name: Build & Lint (all features)

.github/workflows/release.yml

@@ -8,7 +8,6 @@ permissions:
 
 env:
   CARGO_TERM_COLOR: always
-  PROTOC_VERSION: '3.25.3'
   SCCACHE_GHA_ENABLED: "true"
   RUSTC_WRAPPER: "sccache"
 
@@ -38,11 +37,6 @@ jobs:
         with:
           toolchain: nightly-2026-06-16
 
-      - name: Install protoc
-        uses: taiki-e/install-action@v2
-        with:
-          tool: protoc@${{ env.PROTOC_VERSION }}
-
       - name: Install cargo-release
         uses: taiki-e/install-action@v2
         with: