Add javadoc for newly added TrimStrategy interface and sealed impls.

Signed-off-by: Chris Bono <chris.bono@broadcom.com>

Author: onobc

src/main/java/org/springframework/data/redis/connection/RedisStreamCommands.java

@@ -22,12 +22,10 @@
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
-
 import org.jspecify.annotations.NonNull;
 import org.jspecify.annotations.NullMarked;
 import org.jspecify.annotations.NullUnmarked;
 import org.jspecify.annotations.Nullable;
-
 import org.springframework.data.domain.Range;
 import org.springframework.data.redis.connection.stream.*;
 import org.springframework.data.redis.connection.stream.StreamInfo.XInfoConsumers;
@@ -113,30 +111,53 @@ default RecordId xAdd(@NonNull MapRecord<byte[], byte[], byte[]> record) {
 	 */
 	RecordId xAdd(MapRecord<byte[], byte[], byte[]> record, @NonNull XAddOptions options);
 
-
+	/**
+	 * The trimming strategy.
+	 * @since 4.1
+	 */
 	sealed interface TrimStrategy permits MaxLenTrimStrategy, MinIdTrimStrategy {
 	}
 
+	/**
+	 * Trimming strategy that evicts entries as long as the stream's length exceeds the specified threshold.
+	 * @see <a href="https://redis.io/commands/xtrim">Redis Documentation: MAXLEN option for XTRIM</a>
+	 * @since 4.1
+	 */
 	final class MaxLenTrimStrategy implements TrimStrategy {
 		private final long threshold;
 
 		private MaxLenTrimStrategy(long threshold) {
 			this.threshold = threshold;
 		}
 
+		/**
+		 * The maximum number of entries allowed in the stream.
+		 *
+		 * @return non-negative number of entries allowed in the stream
+		 */
 		public long threshold() {
 			return threshold;
 		}
 
 	}
 
+	/**
+	 * Trimming strategy that evicts entries with IDs lower than the specified threshold.
+	 * @see <a href="https://redis.io/commands/xtrim">Redis Documentation: MINID option for XTRIM</a>
+	 * @since 4.1
+	 */
 	final class MinIdTrimStrategy implements TrimStrategy {
 		private final RecordId threshold;
 
 		private MinIdTrimStrategy(RecordId threshold) {
 			this.threshold = threshold;
 		}
 
+		/**
+		 * The lowest stream ID allowed in the stream - all entries whose IDs are less than threshold are trimmed.
+		 *
+		 * @return the lowest stream ID allowed in the stream
+		 */
 		public RecordId threshold() {
 			return threshold;
 		}