docs: started tx priority adr

docs/app/design/adrs/004-priority/page.md

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+---
+title: Priority
+sidebarTitle: Priority
+---
+
+# Decision to choose a priority strategy
+
+**status**: draft
+
+## Context
+
+Some transactions have higher priority for processing than others, so a weighting concept is used to sort the transactions accordingly. Therefore, the weight is defined in configurable labels as queues that the user assigns when submitting a transaction. Finally, transactions are fetched based on their weight, meaning the fetch operation will return a number of transactions proportional to the label weights. For example, if *label1* has a weight of 2 and *label2* has a weight of 1, the fetch operation will return 2 transactions from *label1* and 1 transaction from *label2*.
+
+**Options:**
+  - **SQL Query**: ?
+  - **Memory**: ?
+
+## Decision
+
+?
+
+**Rationale**
+  - ?
+