6eb0909cb7 fuzz: add low-level target for txorphanage (chinggg)
Pull request description:
This adds a low-level fuzz target for orphan transaction handling by creating random transactions and calling all functions in `TxOrphanage`.
It cannot simulate real-world `orphan/unorphan` scenarios effectively since it does not maintain any state about the node and the chain. A high-level fuzz target which construct well-designed transaction graphs will be added later.
ACKs for top commit:
MarcoFalke:
review ACK 6eb0909cb7🐈
Tree-SHA512: b4d64f5941df77d13981f75ec170cef6ffabe782797c982ede7f34134be01dc0026dd7c0bee614bc1d64715e90a933d2a8c95974d402e32eaba8e24cc928299e