Bug: Transcript file path doubled when using storage layer

[davidcforbes]

Description

The transcript addon produces a doubled file path like ./rustpbx-config/cdr/./rustpbx-config/cdr/... when using the storage layer, causing file-not-found errors.

Root Cause

storage.local_full_path() prepends the storage root directory to the path, but the transcript path already contains the full relative path from CWD. This results in a doubled path.

Fix

In src/addons/transcript/handlers.rs, replace storage_ref.local_full_path() and storage_ref.write_bytes() with direct PathBuf::from() and tokio::fs::write().

Fix commit: davidcforbes/rustpbx@55a8468