Add per-path joint sup-t bands to ChaisemartinDHaultfoeuille.by_path #1565

Job	Run time
Pure Python Fallback	1h 20m 30s
Rust Unit Tests (ubuntu-24.04-arm)	1m 33s
Rust Unit Tests (ubuntu-latest)	1m 27s
Rust Unit Tests (macos-latest)	1m 20s
Rust Unit Tests (windows-latest)	2m 41s
Python Tests (macos-latest, py3.13)	28m 27s
Python Tests (macos-latest, py3.14)	24m 32s
Python Tests (ubuntu-latest, py3.14)	59m 30s
Python Tests (ubuntu-latest, py3.11)	50m 16s
Python Tests (macos-latest, py3.11)	23m 42s
Python Tests (windows-latest, py3.13)	51m 0s
Python Tests (ubuntu-latest, py3.13)	52m 4s
Python Tests (ubuntu-24.04-arm, py3.11)	33m 5s
Python Tests (ubuntu-24.04-arm, py3.14)	34m 17s
Python Tests (ubuntu-24.04-arm, py3.13)	34m 22s
Python Tests (windows-latest, py3.14)	51m 2s
Python Tests (windows-latest, py3.11)	36m 13s
	9h 26m 1s

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