style: apply spotless formatting to all Java source files

- Apply google-java-format via spotless:apply
- Standardize license header format
- Fix indentation (4 spaces -> 2 spaces per google-java-format)
- Fix import ordering and grouping
- Fix Javadoc formatting
- 42 files reformatted

Author: rockyyin

src/main/java/org/apache/flink/connector/lance/LanceAggregateSource.java

@@ -1,11 +1,7 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
@@ -15,7 +11,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.apache.flink.connector.lance;
 
 import org.apache.flink.core.io.InputSplit;
@@ -30,92 +25,83 @@
  */
 public class LanceSplit implements InputSplit, Serializable {
 
-    private static final long serialVersionUID = 1L;
-
-    /**
-     * Split number
-     */
-    private final int splitNumber;
-
-    /**
-     * Fragment ID
-     */
-    private final int fragmentId;
-
-    /**
-     * Dataset path
-     */
-    private final String datasetPath;
-
-    /**
-     * Row count in Fragment (estimated)
-     */
-    private final long rowCount;
-
-    /**
-     * Create LanceSplit
-     *
-     * @param splitNumber Split number
-     * @param fragmentId Fragment ID
-     * @param datasetPath Dataset path
-     * @param rowCount Row count
-     */
-    public LanceSplit(int splitNumber, int fragmentId, String datasetPath, long rowCount) {
-        this.splitNumber = splitNumber;
-        this.fragmentId = fragmentId;
-        this.datasetPath = datasetPath;
-        this.rowCount = rowCount;
-    }
-
-    @Override
-    public int getSplitNumber() {
-        return splitNumber;
-    }
-
-    /**
-     * Get Fragment ID
-     */
-    public int getFragmentId() {
-        return fragmentId;
-    }
-
-    /**
-     * Get dataset path
-     */
-    public String getDatasetPath() {
-        return datasetPath;
-    }
-
-    /**
-     * Get row count
-     */
-    public long getRowCount() {
-        return rowCount;
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
-        LanceSplit that = (LanceSplit) o;
-        return splitNumber == that.splitNumber &&
-                fragmentId == that.fragmentId &&
-                rowCount == that.rowCount &&
-                Objects.equals(datasetPath, that.datasetPath);
-    }
-
-    @Override
-    public int hashCode() {
-        return Objects.hash(splitNumber, fragmentId, datasetPath, rowCount);
-    }
-
-    @Override
-    public String toString() {
-        return "LanceSplit{" +
-                "splitNumber=" + splitNumber +
-                ", fragmentId=" + fragmentId +
-                ", datasetPath='" + datasetPath + '\'' +
-                ", rowCount=" + rowCount +
-                '}';
-    }
+  private static final long serialVersionUID = 1L;
+
+  /** Split number */
+  private final int splitNumber;
+
+  /** Fragment ID */
+  private final int fragmentId;
+
+  /** Dataset path */
+  private final String datasetPath;
+
+  /** Row count in Fragment (estimated) */
+  private final long rowCount;
+
+  /**
+   * Create LanceSplit
+   *
+   * @param splitNumber Split number
+   * @param fragmentId Fragment ID
+   * @param datasetPath Dataset path
+   * @param rowCount Row count
+   */
+  public LanceSplit(int splitNumber, int fragmentId, String datasetPath, long rowCount) {
+    this.splitNumber = splitNumber;
+    this.fragmentId = fragmentId;
+    this.datasetPath = datasetPath;
+    this.rowCount = rowCount;
+  }
+
+  @Override
+  public int getSplitNumber() {
+    return splitNumber;
+  }
+
+  /** Get Fragment ID */
+  public int getFragmentId() {
+    return fragmentId;
+  }
+
+  /** Get dataset path */
+  public String getDatasetPath() {
+    return datasetPath;
+  }
+
+  /** Get row count */
+  public long getRowCount() {
+    return rowCount;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    LanceSplit that = (LanceSplit) o;
+    return splitNumber == that.splitNumber
+        && fragmentId == that.fragmentId
+        && rowCount == that.rowCount
+        && Objects.equals(datasetPath, that.datasetPath);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(splitNumber, fragmentId, datasetPath, rowCount);
+  }
+
+  @Override
+  public String toString() {
+    return "LanceSplit{"
+        + "splitNumber="
+        + splitNumber
+        + ", fragmentId="
+        + fragmentId
+        + ", datasetPath='"
+        + datasetPath
+        + '\''
+        + ", rowCount="
+        + rowCount
+        + '}';
+  }
 }