refactor: add MissingDeprecated into checkstyle

pgjdbc/src/main/checkstyle/checks.xml

@@ -91,6 +91,7 @@
                value="WhitespaceAround: ''{0}'' is not preceded with whitespace."/>
     </module>
     <module name="OneStatementPerLine"/>
+    <module name="MissingDeprecated"/>
     <module name="MultipleVariableDeclarations"/>
     <module name="ArrayTypeStyle"/>
     <!--<module name="MissingSwitchDefault"/>-->

pgjdbc/src/main/java/org/postgresql/PGConnection.java

@@ -83,6 +83,7 @@ public interface PGConnection {
    *             does not work correctly for registering classes that cannot be directly loaded by
    *             the JDBC driver's classloader.
    */
+  @Deprecated
   void addDataType(String type, String className);
 
   /**

pgjdbc/src/main/java/org/postgresql/PGRefCursorResultSet.java

@@ -12,12 +12,14 @@
  *             code should call getString() on the ResultSet that contains the refcursor to obtain
  *             the underlying cursor name.
  */
+@Deprecated
 public interface PGRefCursorResultSet {
 
   /**
    * @return the name of the cursor.
    * @deprecated As of 8.0, replaced with calling getString() on the ResultSet that this ResultSet
    *             was obtained from.
    */
+  @Deprecated
   String getRefCursor();
 }

pgjdbc/src/main/java/org/postgresql/PGStatement.java

@@ -43,6 +43,7 @@ public interface PGStatement {
    * @since 7.3
    * @deprecated As of build 302, replaced by {@link #setPrepareThreshold(int)}
    */
+  @Deprecated
   void setUseServerPrepare(boolean flag) throws SQLException;
 
   /**

pgjdbc/src/main/java/org/postgresql/largeobject/LargeObject.java

@@ -141,6 +141,7 @@ public LargeObject copy() throws SQLException {
    * @return the OID of this LargeObject
    * @deprecated As of 8.3, replaced by {@link #getLongOID()}
    */
+  @Deprecated
   public int getOID() {
     return (int) oid;
   }