When SubQuery restarts and the last processed block's state has been
pruned by the RPC node, fetchEventsRange would crash the indexer in a
loop. Now returns empty events for pruned blocks so the indexer can
skip forward gracefully.
The _getBlockRegistryViaHash method in @polkadot/api calls
getRuntimeVersion.raw(header.parentHash) which fails for genesis
and other pruned blocks. Add fallback to current runtime version.
Substrate nodes prune historical state by default (~256 blocks).
When SubQuery restarts and tries to fetch runtime version for old
blocks, it crashes with "State already discarded". This patch adds
a fallback to current runtime version when historical state is
unavailable, preventing crash loops on pruned RPC endpoints.
Also removes --pull from deploy workflow to avoid unnecessary
full rebuilds on every push.