docs(volume_server): record proxy-mode validation and CI matrix

test/volume_server/DEV_PLAN.md

@@ -1140,4 +1140,18 @@ Update this section during implementation:
 - APIs covered: full `/test/volume_server/http` and `/test/volume_server/grpc` suites executed successfully with `VOLUME_SERVER_IMPL=rust`.
 - Profiles covered: existing integration matrix in Rust launcher mode.
 - Gaps introduced/remaining: native Rust endpoint and storage/RPC implementation remains pending; current mode delegates execution to Go volume server.
-- Commit: pending
+- Commit: `6ce4d7ede`
+
+- Date: 2026-02-15
+- Change: Added Rust proxy-supervision launcher mode and validated all volume-server integration suites in proxy mode.
+- APIs covered: full `/test/volume_server/http` and `/test/volume_server/grpc` suites executed successfully with `VOLUME_SERVER_IMPL=rust` and `VOLUME_SERVER_RUST_MODE=proxy`.
+- Profiles covered: existing integration matrix in Rust proxy launcher mode.
+- Gaps introduced/remaining: native Rust endpoint/storage/RPC logic remains pending; current proxy mode still delegates backend handlers to Go.
+- Commit: `a7f50d23b`
+
+- Date: 2026-02-15
+- Change: Expanded GitHub CI Rust smoke job to run both launcher modes (`exec` and `proxy`).
+- APIs covered: representative HTTP/gRPC smoke flows now validated in CI for both Rust launcher execution paths.
+- Profiles covered: CI smoke profile for P1 representative calls.
+- Gaps introduced/remaining: CI still runs Rust mode as smoke scope; full-suite Rust-mode CI remains optional due runtime cost.
+- Commit: `548b3d9a3`

test/volume_server/README.md

@@ -17,6 +17,7 @@ If a `weed` binary is not found, the harness will build one automatically.
 - `WEED_BINARY`: explicit path to the `weed` executable (disables auto-build).
 - `VOLUME_SERVER_IMPL`: select volume-server implementation (`go` default, `rust` for Rust launcher mode).
 - `VOLUME_SERVER_BINARY`: explicit path to the volume-server executable (overrides `VOLUME_SERVER_IMPL`).
+- `VOLUME_SERVER_RUST_MODE`: Rust launcher mode (`exec` default, `proxy` for Rust front proxy + Go backend).
 - `VOLUME_SERVER_RUST_REBUILD=1`: force rebuild of Rust volume-server binary in Rust mode.
 - `VOLUME_SERVER_IT_KEEP_LOGS=1`: keep temporary test directories and process logs.