Add INFO-level logs with DEBUG: prefix to trace multiproof task lifecycle:
- Log worker system initialization with concurrency limits
- Log when queue is full and requests are enqueued
- Log when tasks are spawned (storage and account multiproofs)
- Log when ProofCalculated messages are received
- Log when on_calculation_complete is called
- Log when pending tasks are dequeued and spawned
These logs will help diagnose why inflight_multiproofs_histogram drops to 0
and identify if the feedback loop between task completion and metric updates
is functioning correctly.
