Improve detection of blob fee spikes and adaptive posting

[MujkicA]

Currently, blob posting will be paused if the transaction price reaches a configured threshold. We should explore a more flexible way of controlling our spending while also keeping the committer free from need of manual intervention.

Example approach suggested by @Voxelot:

• Have a moving avg for 5min and 1 hour. When the 5 min avg crosses below the 1 hour avg, we start posting.
• If 12 hours elapsed, post regardless of price + trigger alert
• If spending in 24h exceed some budgeted amount (e.g. 0.3 ETH), pause posting for 24h + trigger alert

Whether we choose to refine the above approach or come up with something different, we can make use of historical transaction data to test the algorithm.