BM-1481: keep error context when input/program upload fails (#1016)

This has made some debugging much more painful, fixing now before I
forget

Author: austinabell

crates/boundless-market/src/client.rs

@@ -619,28 +619,30 @@ where
     pub async fn upload_program(&self, program: &[u8]) -> Result<Url, ClientError>
     where
         St: StorageProvider,
+        <St as StorageProvider>::Error: std::error::Error + Send + Sync + 'static,
     {
         Ok(self
             .storage_provider
             .as_ref()
             .context("Storage provider not set")?
             .upload_program(program)
             .await
-            .map_err(|_| anyhow!("Failed to upload program"))?)
+            .context("Failed to upload program")?)
     }
 
     /// Upload input to the storage provider.
     pub async fn upload_input(&self, input: &[u8]) -> Result<Url, ClientError>
     where
         St: StorageProvider,
+        <St as StorageProvider>::Error: std::error::Error + Send + Sync + 'static,
     {
         Ok(self
             .storage_provider
             .as_ref()
             .context("Storage provider not set")?
             .upload_input(input)
             .await
-            .map_err(|_| anyhow!("Failed to upload input"))?)
+            .context("Failed to upload input")?)
     }
 
     /// Initial parameters that will be used to build a [ProofRequest] using the [RequestBuilder].