Remove Empty Chunks in Cloudfetch concatenation #2939

Job	Run time
check-types (3.9)	2m 14s
Unit Tests (Python 3.14, min deps)	18m 37s
check-linting (3.14)	16m 46s
Unit Tests + PyArrow (Python 3.11, default deps)	4m 22s
Unit Tests + PyArrow (Python 3.10, min deps)	4m 44s
check-linting (3.13)	1m 51s
check-linting (3.10)	1m 46s
Unit Tests (Python 3.10, default deps)	3m 32s
Unit Tests (Python 3.12, default deps)	3m 31s
Unit Tests (Python 3.10, min deps)	4m 5s
Unit Tests + PyArrow (Python 3.14, min deps)	19m 28s
Unit Tests + PyArrow (Python 3.11, min deps)	4m 53s
Unit Tests (Python 3.9, min deps)	4m 4s
check-types (3.13)	2m 3s
check-types (3.10)	1m 53s
Unit Tests (Python 3.11, min deps)	4m 9s
Unit Tests + PyArrow (Python 3.9, min deps)	4m 55s
Unit Tests (Python 3.9, default deps)	3m 41s
check-linting (3.9)	2m 1s
Unit Tests + PyArrow (Python 3.14, default deps)	19m 32s
check-types (3.11)	1m 56s
Unit Tests (Python 3.11, default deps)	3m 21s
Unit Tests (Python 3.14, default deps)	18m 36s
Unit Tests + PyArrow (Python 3.10, default deps)	4m 22s
Unit Tests + PyArrow (Python 3.13, default deps)	4m 20s
Unit Tests + PyArrow (Python 3.12, default deps)	4m 35s
Unit Tests (Python 3.13, default deps)	3m 30s
check-linting (3.11)	1m 44s
check-types (3.14)	16m 57s
check-types (3.12)	1m 57s
Unit Tests + PyArrow (Python 3.9, default deps)	4m 35s
check-linting (3.12)	1m 48s
	3h 15m 48s

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