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69d43905b7f1d4849dfaea1b5744ee473ccc8744 test: add coverage for wallet read write db deadlock (furszy) 12daf6fcdcbf5c7f03038338d843df3877714b24 walletdb: scope bdb::EraseRecords under a single db txn (furszy) 043fcb0b053eee6021cc75e3d3f41097f52698c0 wallet: bugfix, GetNewCursor() misses to provide batch ptr to BerkeleyCursor (furszy) Pull request description: Decoupled from #26644 so it can closed in favor of #26715. Basically, with bdb, we can't make a write operation while we are traversing the db with the same db handler. These two operations are performed in different txn contexts and cause a deadlock. Added coverage by using `EraseRecords()` which is the simplest function that executes this process. To replicate it, need bdb support and drop the first commit. The test will run forever. ACKs for top commit: achow101: ACK 69d43905b7f1d4849dfaea1b5744ee473ccc8744 hebasto: re-ACK 69d43905b7f1d4849dfaea1b5744ee473ccc8744 Tree-SHA512: b3773be78925f674e962f4a5c54b398a9d0cfe697148c01c3ec0d68281cc5c1444b38165960d219ef3cf1a57c8ce6427f44a876275958d49bbc0808486e19d7d