perf: add Rust WAL codec and durable disk experiments

.github/workflows/rust-test.yml

@@ -59,6 +59,10 @@ jobs:
         # regression test was dead weight in CI. `--workspace` covers the crates
         # that were silently untested (api, server, client, metrics, the facade).
         run: cargo test --workspace --all-targets
+      - name: WAL component correctness smoke tests
+        run: |
+          cargo run -p lance-context-wal --features lab --bin context-wal-lab -- codec --payload-bytes 1024 --rows 8 --iterations 2
+          cargo run -p lance-context-wal --features lab --bin context-wal-lab -- disk --directory "$RUNNER_TEMP/wal-disk-smoke" --payload-bytes 1024 --batch 4 --writers 2 --groups-per-writer 2 --rounds 8
       - name: Start etcd for HA scheduler test
         run: |
           ETCD_VERSION=3.7.0

.github/workflows/style.yml

@@ -55,6 +55,8 @@ jobs:
       # cfg-gated breakage is caught here instead of at release time.
       - name: Clippy (lance-context, default features)
         run: cargo clippy --manifest-path crates/lance-context/Cargo.toml --all-targets -- -D warnings
+      - name: Clippy (WAL component experiments)
+        run: cargo clippy -p lance-context-wal --features lab --all-targets -- -D warnings
 
   typos:
     name: Spell Check