SharePoint File Auto-Sort Solution

I need a Power Automate cloud flow that watches a SharePoint document library, reads each incoming file name, and immediately moves the file into the correct parent folder and its matching year sub-folder. The logic should create the sub-folder on the fly when it does not exist, run unattended, and keep all existing permissions intact.

Reliability is essential: if the service account ever loses its token or encounters a locked file, the flow must retry gracefully and store a simple text-based log so I can audit every move. It also needs to scale; at peak we can receive several hundred files in a minute, so parallelism and threshold controls matter. Looking forward, I want to bolt on extra rules later—possibly to pull documents from ShareFile as well—so the solution must be clearly commented and built with modular expressions or child flows that I can reuse.

Deliverables
• A ready-to-use, production-grade cloud flow exported as a .zip
• An import guide and a short hand-off video showing how to change matching logic or extend it to new libraries
• One round of post-deployment tweaks if my team uncovers edge-cases in the first week

Please outline any premium connectors you rely on up front. Experience with SharePoint REST, expressions, and robust error handling will be highly valued.