feat: add S3-compatible storage provider (MinIO, Ceph, R2, etc.)

Adds a new 'S3-Compatible Storage' provider that works with any
S3-API-compatible object storage service, including MinIO, Ceph,
Cloudflare R2, Backblaze B2, and others.

Changes:
- New provider class: classes/providers/storage/s3-compatible-provider.php
  - Provider key: s3compatible
  - Reads user-configured endpoint URL from settings
  - Uses path-style URL access (required by most S3-compatible services)
  - Supports credentials via AS3CF_S3COMPAT_ACCESS_KEY_ID /
    AS3CF_S3COMPAT_SECRET_ACCESS_KEY wp-config.php constants
  - Disables AWS-specific features (Block Public Access, Object Ownership)
- New provider SVG icons (s3compatible.svg, -link.svg, -round.svg)
- Registered provider in main plugin class with endpoint setting support
- Updated StorageProviderSubPage to show endpoint URL input for S3-compatible
- Built pro settings bundle with rollup (Svelte 4.2.19)
- Added package.json and updated rollup.config.mjs for pro-only builds

classes/upgrades/upgrade-tools-errors.php

@@ -0,0 +1,107 @@
+<?php
+
+namespace DeliciousBrains\WP_Offload_Media\Upgrades;
+
+use DeliciousBrains\WP_Offload_Media\Pro\Tool;
+use DeliciousBrains\WP_Offload_Media\Pro\Tools_Manager;
+
+/**
+ * Upgrade_Tools_Errors Class
+ *
+ * This class handles updating internal error info from previous tools executions
+ *
+ * @since 2.6.0
+ */
+class Upgrade_Tools_Errors extends Upgrade {
+
+	/**
+	 * @var int
+	 */
+	protected $upgrade_id = 9;
+
+	/**
+	 * @var string
+	 */
+	protected $upgrade_name = 'tools_error';
+
+	/**
+	 * @var string 'metadata', 'attachment'
+	 */
+	protected $upgrade_type = 'metadata';
+
+	/**
+	 * Get running update text.
+	 *
+	 * @return string
+	 */
+	protected function get_running_update_text() {
+		return __( 'and reformatting internal data about previous errors from tools.', 'amazon-s3-and-cloudfront' );
+	}
+
+	/**
+	 * Get an array of tool names that may have saved error info
+	 *
+	 * @param string     $prefix
+	 * @param int        $limit
+	 * @param bool|mixed $offset
+	 *
+	 * @return array
+	 */
+	protected function get_items_to_process( $prefix, $limit, $offset = false ) {
+		global $as3cf;
+
+		if ( get_class( $as3cf ) !== 'Amazon_S3_And_CloudFront_Pro' ) {
+			return array();
+		}
+
+		$tools_manager = Tools_Manager::get_instance( $as3cf );
+		$tools         = $tools_manager->get_tools();
+
+		return array_keys( $tools );
+	}
+
+	/**
+	 * Update saved errors for a tool.
+	 *
+	 * @param mixed $item
+	 *
+	 * @return bool
+	 */
+	protected function upgrade_item( $item ) {
+		global $as3cf;
+
+		if ( empty( $item ) || ! is_string( $item ) ) {
+			// We really don't want to this upgrade to fail,
+			// broken notices can still be dismissed, so just move on.
+			return true;
+		}
+
+		$tools_manager = Tools_Manager::get_instance( $as3cf );
+		$tools         = $tools_manager->get_tools();
+
+		if ( ! empty( $tools[ $item ] ) ) {
+			/** @var Tool $tool */
+			$tool = $tools[ $item ];
+
+			$errors     = $tool->get_errors();
+			$new_errors = array();
+
+			if ( ! empty( $errors ) ) {
+				foreach ( $errors as $blog_id => $blog ) {
+					foreach ( $blog as $attachment_id => $messages ) {
+						$new_errors[] = (object) array(
+							'blog_id'     => $blog_id,
+							'source_type' => 'media-library',
+							'source_id'   => $attachment_id,
+							'messages'    => (array) $messages,
+						);
+					}
+				}
+
+				$tool->update_errors( $new_errors );
+			}
+		}
+
+		return true;
+	}
+}