Bump aws-smithy-observability to 0.1.6 for new trait methods

Author: vcjana

rust-runtime/Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "aws-smithy-observability"
-version = "0.1.5"
+version = "0.1.6"
 authors = [
   "AWS Rust SDK Team <[email protected]>",
 ]
@@ -23,3 +23,4 @@ targets = ["x86_64-unknown-linux-gnu"]
 cargo-args = ["-Zunstable-options", "-Zrustdoc-scrape-examples"]
 rustdoc-args = ["--cfg", "docsrs"]
 # End of docs.rs metadata
+

rust-runtime/aws-smithy-observability/Cargo.toml

@@ -19,7 +19,13 @@ pub trait ProvideMeter: Send + Sync + Debug {
     fn get_meter(&self, scope: &'static str, attributes: Option<&Attributes>) -> Meter;
 
     /// Returns a reference to `self` as `&dyn Any` for downcasting.
-    fn as_any(&self) -> &dyn std::any::Any;
+    /// 
+    /// The default implementation returns a reference to the unit type,
+    /// which will fail any downcast attempts. Implementations should override
+    /// this to return `self` for proper type inspection.
+    fn as_any(&self) -> &dyn std::any::Any {
+        &()
+    }
 
     /// Returns the name of this provider implementation.
     /// This is used for feature tracking without requiring type imports.