fix: resolve clippy warnings across workspace

.github/workflows/ci.yml

@@ -61,9 +61,17 @@ jobs:
 
       - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2
 
-      - name: Run clippy
+      - name: Run clippy (all features)
         run: cargo clippy --all-targets --all-features -- -D warnings
 
+      - name: Run clippy (all features except local)
+        run: |
+          FEATURES=$(cargo metadata --no-deps --format-version 1 \
+            | jq -r '[.packages[] | select(.name == "rmcp") | .features | keys[]
+                      | select(startswith("__") | not)
+                      | select(. != "local")] | join(",")')
+          cargo clippy --package rmcp --all-targets --no-default-features --features "$FEATURES" -- -D warnings
+
   semver:
     name: SemVer Check
     runs-on: ubuntu-latest

conformance/src/bin/client.rs

@@ -1,3 +1,8 @@
+#![expect(
+    deprecated,
+    reason = "The conformance suite still exercises deprecated sampling scenarios"
+)]
+
 use rmcp::{
     ClientHandler, ClientLifecycleMode, ClientServiceExt, ErrorData, RoleClient, ServiceExt,
     model::*,