feat: initial release v1.1.0

Cloudflare R2 media offload manager for peptiderepo.com.
Built on WP Offload Media Lite. Supersedes the one-off migration script
and mu-plugin peptiderepo-r2-endpoint.php.

Features:
- Admin page under Peptide Repo > R2 Media Manager (shared umbrella menu)
- ensure_umbrella_menu() guard — safe for multi-plugin umbrella sharing
- Batch AJAX migration to R2 with pause/resume and progress bar
- Remove-local-copies batch with physical disk presence check
- Activity log table (wp_pr_r2_log) with self-healing on plugins_loaded
- Test R2 connection button
- R2 endpoint injection via as3cf_aws_s3_client_args filter

CHANGELOG.md

@@ -0,0 +1,26 @@
+# Changelog — Peptide Repo R2 Manager
+
+All notable changes to this project will be documented in this file.
+Format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [1.1.0] — 2026-04-25
+
+### Changed
+- Admin page moved from `Settings > R2 Media Manager` to `Peptide Repo > R2 Media Manager`
+  using a shared top-level umbrella menu (`peptiderepo` slug).
+- `PR_R2_Admin_Page` now registers the umbrella menu via `ensure_umbrella_menu()` —
+  a `$menu`-array guard so multiple plugins can share the parent safely regardless of
+  load order.
+- `enqueue_assets()` hook suffix updated from `settings_page_peptiderepo-r2-manager`
+  to `peptiderepo_page_peptiderepo-r2-manager`.
+- Added `PARENT_SLUG` class constant (`peptiderepo`).
+
+## [1.0.0] — 2026-04-25
+
+### Added
+- Initial release. Cloudflare R2 media offload manager built on WP Offload Media Lite.
+- Admin dashboard: status table, Test R2 Connection, Migrate to R2, Remove Local Copies,
+  Activity Log.
+- Batch AJAX operations with pause/resume and progress bar.
+- `wp_pr_r2_log` table with self-healing on `plugins_loaded`.
+- R2 endpoint injection via `as3cf_aws_s3_client_args` filter (supersedes mu-plugin).