Add early validation that RNG seeds are uint32s

Inspired by #685

PiperOrigin-RevId: 936470606
Change-Id: I415b47de84c6337e4dff87ea2996dc7020974031

Author: Augustin-Zidek

src/alphafold3/common/folding_input.py

@@ -980,6 +980,11 @@ def __post_init__(self):
     if not self.rng_seeds:
       raise ValueError('Input must have at least one RNG seed.')
 
+    if any(seed < 0 or seed > 2**32 - 1 for seed in self.rng_seeds):
+      raise ValueError(
+          f'RNG seeds must be 32-bit unsigned integers, got {self.rng_seeds}'
+      )
+
     if not self.name.strip() or not self.sanitised_name():
       raise ValueError(
           'Input name must be non-empty and contain at least one valid'