Fix: Add missing feature for with-avahi feature (#1600)

* fix: add missing feature for Anahi
* ci: Add feature check for discovery backends

Fixes and prevents regression of missing feature dependencies in discovery
backends (with-avahi, with-dns-sd, with-libmdns). This check ensures
all feature combinations compile correctly on Linux where the native
dependencies are available.

---------

Co-authored-by: Roderick van Domburg <[email protected]>

Author: photovoltex

.github/workflows/build.yml

@@ -89,6 +89,13 @@ jobs:
           --include-features rustls-tls-native-roots
           --exclude-features native-tls,rustls-tls-webpki-roots
 
+      - name: Check discovery features (Linux only)
+        if: runner.os == 'Linux'
+        run: >
+          cargo hack check -p librespot-discovery --each-feature --exclude-all-features
+          --include-features native-tls
+          --exclude-features rustls-tls-native-roots,rustls-tls-webpki-roots
+
       - name: Build binary with default features
         run: cargo build --frozen
 

discovery/Cargo.toml

@@ -13,7 +13,7 @@ edition.workspace = true
 default = ["with-libmdns", "native-tls"]
 
 # Discovery backends
-with-avahi = ["dep:serde", "dep:zbus"]
+with-avahi = ["dep:serde", "dep:zbus", "futures-util/async-await-macro"]
 with-dns-sd = ["dep:dns-sd"]
 with-libmdns = ["dep:libmdns"]