feat(reports): support threads digest and reviewed answer drafts - #162

The previously reported minor test-coverage finding remains open for the new client paths.

Adds an opt-in Appwrite-backed support-thread digest that ranks threads needing replies, with optional QA-generated answer drafts for human review. A new Support dashboard lets admins inspect conversations, edit drafts, and approve or reject them; posting approved answers remains delegated to the threads project's function. The pull request also expands configuration, API, scheduling, shutdown, telemetry, documentation, and live-QA controls.