Removed empty interface hash_engine
Made Hash_server static no need to instantiate
Removed unused requirements
Removed dict usage

Use single pool for all rpcs
Store state in a single object and made hash_server and rpc_api static
Improved logic

Enable passing proxy and hash_key in the call

Add support for disabling session reuse and changing hashing endpoint

Don't store session in auth as it is not needed
Reduce rpc pool size to 150 (that should be enough for 500-600 workers)
Add adapter mounts for all protocols as proxies uses the pool by their own urls

Remove unused function