[PECOBLR-2461] Add comprehensive MST transaction E2E tests #2859

Job	Run time
check-linting (3.13)	1m 35s
check-linting (3.9)	1m 30s
check-linting (3.12)	1m 35s
check-types (3.12)	1m 10s
check-types (3.13)	1m 16s
check-types (3.9)	1m 23s
check-types (3.14)	1m 57s
Unit Tests (Python 3.10, default deps)	3m 13s
check-types (3.10)	1m 51s
check-linting (3.11)	59s
Unit Tests + PyArrow (Python 3.12, default deps)	3m 32s
check-types (3.11)	1m 15s
Unit Tests + PyArrow (Python 3.10, min deps)	3m 54s
Unit Tests (Python 3.13, default deps)	3m 13s
Unit Tests (Python 3.10, min deps)	3m 5s
Unit Tests (Python 3.11, default deps)	3m 10s
Unit Tests + PyArrow (Python 3.9, min deps)	3m 49s
Unit Tests (Python 3.9, default deps)	2m 49s
check-linting (3.14)	1m 1s
Unit Tests + PyArrow (Python 3.9, default deps)	3m 33s
Unit Tests + PyArrow (Python 3.13, default deps)	3m 21s
Unit Tests (Python 3.14, default deps)	2m 38s
Unit Tests + PyArrow (Python 3.14, default deps)	3m 29s
Unit Tests (Python 3.9, min deps)	3m 7s
Unit Tests (Python 3.12, default deps)	2m 38s
Unit Tests (Python 3.11, min deps)	3m 4s
Unit Tests + PyArrow (Python 3.14, min deps)	3m 44s
Unit Tests (Python 3.14, min deps)	2m 48s
check-linting (3.10)	1m 6s
Unit Tests + PyArrow (Python 3.11, min deps)	3m 43s
Unit Tests + PyArrow (Python 3.10, default deps)	3m 20s
Unit Tests + PyArrow (Python 3.11, default deps)	3m 15s
	1h 22m 3s

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