[PECOBLR-2461] Add comprehensive MST transaction E2E tests #2854

Job	Run time
check-linting (3.13)	1m 14s
check-linting (3.9)	2m 3s
check-types (3.14)	17m 46s
check-linting (3.10)	1m 41s
check-linting (3.12)	1m 5s
check-linting (3.11)	1m 58s
check-linting (3.14)	15m 48s
check-types (3.12)	2m 7s
check-types (3.11)	1m 15s
check-types (3.9)	1m 23s
check-types (3.10)	1m 58s
check-types (3.13)	1m 26s
Unit Tests (Python 3.9, default deps)	1m 22s
Unit Tests (Python 3.10, min deps)	1m 19s
Unit Tests (Python 3.10, default deps)	1m 31s
Unit Tests (Python 3.11, default deps)	1m 33s
Unit Tests (Python 3.9, min deps)	1m 19s
Unit Tests + PyArrow (Python 3.9, min deps)	1m 46s
Unit Tests (Python 3.11, min deps)	1m 16s
Unit Tests + PyArrow (Python 3.11, default deps)	1m 50s
Unit Tests (Python 3.14, min deps)	1m 28s
Unit Tests (Python 3.13, default deps)	1m 47s
Unit Tests + PyArrow (Python 3.10, min deps)	1m 47s
Unit Tests (Python 3.14, default deps)	1m 27s
Unit Tests (Python 3.12, default deps)	1m 27s
Unit Tests + PyArrow (Python 3.10, default deps)	1m 57s
Unit Tests + PyArrow (Python 3.11, min deps)	1m 40s
Unit Tests + PyArrow (Python 3.9, default deps)	1m 46s
Unit Tests + PyArrow (Python 3.14, min deps)	1m 46s
Unit Tests + PyArrow (Python 3.13, default deps)	3m 27s
Unit Tests + PyArrow (Python 3.14, default deps)	1m 55s
Unit Tests + PyArrow (Python 3.12, default deps)	1m 39s
	1h 23m 46s

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