Refactor: make json_encode_strip_quotes() public static and reuse from SearchReplacer

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>

Author: Copilot

src/Search_Replace_Command.php

@@ -939,7 +939,7 @@ private static function esc_like( $old ) {
 	 * @param string $str The string to encode.
 	 * @return string The JSON-encoded string without surrounding quotes, or the original string on failure.
 	 */
-	private static function json_encode_strip_quotes( $str ) {
+	public static function json_encode_strip_quotes( $str ) {
 		$encoded = json_encode( $str ); // phpcs:ignore WordPress.WP.AlternativeFunctions.json_encode_json_encode
 		return false !== $encoded ? substr( $encoded, 1, -1 ) : $str;
 	}

src/WP_CLI/SearchReplacer.php

@@ -89,10 +89,8 @@ public function __construct( $from, $to, $recurse_objects = false, $regex = fals
 		$this->clear_log_data();
 
 		// Compute JSON-encoded versions (stripping outer quotes) for handling raw JSON values in the database.
-		$from_encoded    = json_encode( $from ); // phpcs:ignore WordPress.WP.AlternativeFunctions.json_encode_json_encode
-		$this->from_json = false !== $from_encoded ? substr( $from_encoded, 1, -1 ) : $from;
-		$to_encoded      = json_encode( $to ); // phpcs:ignore WordPress.WP.AlternativeFunctions.json_encode_json_encode
-		$this->to_json   = false !== $to_encoded ? substr( $to_encoded, 1, -1 ) : $to;
+		$this->from_json = \Search_Replace_Command::json_encode_strip_quotes( $from );
+		$this->to_json   = \Search_Replace_Command::json_encode_strip_quotes( $to );
 
 		// Get the XDebug nesting level. Will be zero (no limit) if no value is set
 		$this->max_recursion = intval( ini_get( 'xdebug.max_nesting_level' ) );