Remove hashmap extension

Author: a-d

grounding/src/main/java/com/sap/ai/sdk/grounding/model/BaseDocument.java

@@ -31,7 +31,7 @@
 
 /** Base class for documents, document requests and responses. */
 @Beta // CHECKSTYLE:OFF
-public class BaseDocument extends HashMap<String, Object>
+public class BaseDocument 
 // CHECKSTYLE:ON
 {
   @JsonProperty("chunks")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/CollectionRequest.java

@@ -30,7 +30,7 @@
 
 /** A request for creating a new, single collection. */
 @Beta // CHECKSTYLE:OFF
-public class CollectionRequest extends HashMap<String, Object>
+public class CollectionRequest 
 // CHECKSTYLE:ON
 {
   @JsonProperty("title")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/DocumentCreateRequest.java

@@ -31,7 +31,7 @@
 
 /** A create request containing one or more new documents to create and store in a collection. */
 @Beta // CHECKSTYLE:OFF
-public class DocumentCreateRequest extends HashMap<String, Object>
+public class DocumentCreateRequest 
 // CHECKSTYLE:ON
 {
   @JsonProperty("documents")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/DocumentInput.java

@@ -32,7 +32,7 @@
 
 /** A single document stored in a collection by ID. */
 @Beta // CHECKSTYLE:OFF
-public class DocumentInput extends HashMap<String, Object>
+public class DocumentInput 
 // CHECKSTYLE:ON
 {
   @JsonProperty("chunks")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/DocumentKeyValueListPair.java

@@ -33,7 +33,7 @@
 
 /** DocumentKeyValueListPair */
 @Beta // CHECKSTYLE:OFF
-public class DocumentKeyValueListPair extends HashMap<String, Object>
+public class DocumentKeyValueListPair 
 // CHECKSTYLE:ON
 {
   @JsonProperty("key")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/DocumentUpdateRequest.java

@@ -34,7 +34,7 @@
  * by ID.
  */
 @Beta // CHECKSTYLE:OFF
-public class DocumentUpdateRequest extends HashMap<String, Object>
+public class DocumentUpdateRequest 
 // CHECKSTYLE:ON
 {
   @JsonProperty("documents")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/EmbeddingConfig.java

@@ -28,7 +28,7 @@
 
 /** EmbeddingConfig */
 @Beta // CHECKSTYLE:OFF
-public class EmbeddingConfig extends HashMap<String, Object>
+public class EmbeddingConfig 
 // CHECKSTYLE:ON
 {
   @JsonProperty("modelName")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/KeyValueListPair.java

@@ -31,7 +31,7 @@
 
 /** KeyValueListPair */
 @Beta // CHECKSTYLE:OFF
-public class KeyValueListPair extends HashMap<String, Object>
+public class KeyValueListPair 
 // CHECKSTYLE:ON
 {
   @JsonProperty("key")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/PipelinePostRequst.java

@@ -28,7 +28,7 @@
 
 /** PipelinePostRequst */
 @Beta // CHECKSTYLE:OFF
-public class PipelinePostRequst extends HashMap<String, Object>
+public class PipelinePostRequst 
 // CHECKSTYLE:ON
 {
   @JsonProperty("type")

grounding/src/main/java/com/sap/ai/sdk/grounding/model/PipelinePostRequstConfiguration.java

@@ -28,7 +28,7 @@
 
 /** PipelinePostRequstConfiguration */
 @Beta // CHECKSTYLE:OFF
-public class PipelinePostRequstConfiguration extends HashMap<String, Object>
+public class PipelinePostRequstConfiguration 
 // CHECKSTYLE:ON
 {
   @JsonProperty("destination")