fix(amazonq): fix deserialization failure from workspace context chunks (aws#5539)

`@JsonIgnoreProperties` should be a class-level annotation

Author: rli

.changes/next-release/bugfix-00947041-108c-4ef1-bec6-eb749dae7c2f.json

@@ -0,0 +1,4 @@
+{
+  "type" : "bugfix",
+  "description" : "Fix issue where Amazon Q cannot process chunks from local `@workspace` context"
+}

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/project/ProjectContextProvider.kt

@@ -74,17 +74,17 @@ class ProjectContextProvider(val project: Project, private val encoderServer: En
     )
 
     // TODO: move to LspMessage.kt
+    @JsonIgnoreProperties(ignoreUnknown = true)
     data class Usage(
-        @JsonIgnoreProperties(ignoreUnknown = true)
         @JsonProperty("memoryUsage")
         val memoryUsage: Int? = null,
         @JsonProperty("cpuUsage")
         val cpuUsage: Int? = null,
     )
 
     // TODO: move to LspMessage.kt
+    @JsonIgnoreProperties(ignoreUnknown = true)
     data class Chunk(
-        @JsonIgnoreProperties(ignoreUnknown = true)
         @JsonProperty("filePath")
         val filePath: String? = null,
         @JsonProperty("content")