[feature] price tracker - alert on a new "lowest" or "highest" price value, get alerts when products reach a new low (or high) value

Price tracker - alert on a new "lowest" or "highest" price value, get alerts when products reach a new low (or high) value

So it would look in all history, find the lowest, if the new price is the lowest, send a trigger

Start with the issue description and clarify how the complete price history defines a new low or high, including whether ties count. Trace the existing price-tracking and alert flow, then verify that a notification is sent only when a product reaches a new historical minimum or maximum.

Written by the indexing model from the issue text.