Address PR review round 2: token dedup, defensive props, GA queryChangeFeed

- Fix dedup: use token-based matching instead of substring contains()
  to avoid false positives (e.g. 2.28.0 matching 2.28.0-beta.1)
- Cache properties map and use getOrDefault() for defensive fallback
  if properties file is missing at runtime
- GA queryChangeFeed in CosmosEncryptionAsyncContainer and
  CosmosEncryptionContainer (core SDK API is already public)
- Update changelog to include queryChangeFeed GA

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: kushagraThapar

sdk/cosmos/azure-cosmos-encryption/CHANGELOG.md

@@ -4,7 +4,7 @@
 
 #### Features Added
 * Added user agent tracking for the encryption SDK. The user agent string now includes `azure-cosmos-encryption/{version}` to enable telemetry tracking of encryption SDK adoption and version distribution. - See [PR 48505](https://github.com/Azure/azure-sdk-for-java/pull/48505)
-* GA'd `deleteAllItemsByPartitionKey` API in `CosmosEncryptionAsyncContainer` and `CosmosEncryptionContainer`. - See [PR 48505](https://github.com/Azure/azure-sdk-for-java/pull/48505)
+* GA'd `deleteAllItemsByPartitionKey` and `queryChangeFeed` APIs in `CosmosEncryptionAsyncContainer` and `CosmosEncryptionContainer`. - See [PR 48505](https://github.com/Azure/azure-sdk-for-java/pull/48505)
 
 #### Breaking Changes
 

sdk/cosmos/azure-cosmos-encryption/src/main/java/com/azure/cosmos/encryption/CosmosEncryptionAsyncContainer.java

@@ -629,8 +629,7 @@ public <T> CosmosPagedFlux<T> queryItemsOnEncryptedProperties(SqlQuerySpecWithEn
      * @return a {@link CosmosPagedFlux} containing one or several feed response pages of the obtained
      * items or an error.
      */
-    // TODO Make this api public once it is GA in cosmos core library
-    <T> CosmosPagedFlux<T> queryChangeFeed(CosmosChangeFeedRequestOptions options, Class<T> classType) {
+    public <T> CosmosPagedFlux<T> queryChangeFeed(CosmosChangeFeedRequestOptions options, Class<T> classType) {
         checkNotNull(options, "Argument 'options' must not be null.");
         checkNotNull(classType, "Argument 'classType' must not be null.");
 

sdk/cosmos/azure-cosmos-encryption/src/main/java/com/azure/cosmos/encryption/CosmosEncryptionContainer.java

@@ -276,8 +276,7 @@ public <T> CosmosPagedIterable<T> queryItemsOnEncryptedProperties(SqlQuerySpecWi
      * @param classType the class type.
      * @return a {@link CosmosPagedFlux} containing one feed response page
      */
-    // TODO Make this api public once it is GA in cosmos core library
-    <T> CosmosPagedIterable<T> queryChangeFeed(
+    public <T> CosmosPagedIterable<T> queryChangeFeed(
         CosmosChangeFeedRequestOptions options,
         Class<T> classType) {
         checkNotNull(options, "Argument 'options' must not be null.");

sdk/cosmos/azure-cosmos-encryption/src/main/java/com/azure/cosmos/encryption/implementation/Constants.java

@@ -5,12 +5,15 @@
 
 import com.azure.core.util.CoreUtils;
 
+import java.util.Map;
+
 public class Constants {
     public static final int CACHED_ENCRYPTION_SETTING_DEFAULT_DEFAULT_TTL_IN_MINUTES = 60;
 
     public static final String PROPERTIES_FILE_NAME = "azure-cosmos-encryption.properties";
-    public static final String CURRENT_VERSION = CoreUtils.getProperties(PROPERTIES_FILE_NAME).get("version");
-    public static final String CURRENT_NAME = CoreUtils.getProperties(PROPERTIES_FILE_NAME).get("name");
+    private static final Map<String, String> PROPERTIES = CoreUtils.getProperties(PROPERTIES_FILE_NAME);
+    public static final String CURRENT_NAME = PROPERTIES.getOrDefault("name", "azure-cosmos-encryption");
+    public static final String CURRENT_VERSION = PROPERTIES.getOrDefault("version", "unknown");
     public static final String USER_AGENT_SUFFIX = CURRENT_NAME + "/" + CURRENT_VERSION;
 
     public static final String INTENDED_COLLECTION_RID_HEADER = "x-ms-cosmos-intended-collection-rid";

sdk/cosmos/azure-cosmos/src/main/java/com/azure/cosmos/implementation/RxDocumentClientImpl.java

@@ -1089,11 +1089,15 @@ public void appendUserAgentSuffix(String suffix) {
             return;
         }
 
-        // Check for duplicate to prevent unbounded growth when multiple encryption
-        // clients wrap the same CosmosAsyncClient
+        // Check for duplicate using token matching to prevent unbounded growth when
+        // multiple encryption clients wrap the same CosmosAsyncClient
         String currentSuffix = this.userAgentContainer.getSuffix();
-        if (StringUtils.isNotEmpty(currentSuffix) && currentSuffix.contains(trimmedSuffix)) {
-            return;
+        if (StringUtils.isNotEmpty(currentSuffix)) {
+            for (String token : currentSuffix.split("\\s+")) {
+                if (trimmedSuffix.equals(token)) {
+                    return;
+                }
+            }
         }
 
         // Preserve feature flags ("|F...") which are appended to userAgent directly