chore: Update to PolkadotSDK release `stable2503`#1571

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ipapandinas wants to merge 2 commits intomasterfrom

chore/uplift-stable2503

Commits on Dec 12, 2025

chore: stable2503 uplift
ipapandinas
committed

Commits on Dec 18, 2025

Merge branch 'master' into chore/uplift-stable2503
ipapandinas
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