BUG: Copy attrs on pd.merge() #23690

Job	Run time
python-dev	0s
Linux-32-bit	18m 44s
Pyodide build	25m 52s
Linux-Musl	15m 28s
windows-latest actions-312.yaml	35m 13s
windows-latest actions-313.yaml	42m 13s
macos-13 actions-310.yaml	28m 31s
windows-latest actions-310.yaml	33m 51s
macos-13 actions-313.yaml	39m 51s
macos-13 actions-312.yaml	26m 43s
windows-latest actions-311.yaml	34m 55s
macos-13 actions-311.yaml	25m 9s
macos-14 actions-310.yaml	32m 22s
macos-14 actions-312.yaml	23m 48s
macos-14 actions-311.yaml	30m 2s
macos-14 actions-313.yaml	26m 59s
ubuntu-24.04 actions-310.yaml	47m 3s
Minimum Versions	23m 23s
Locale: zh_CN	23m 16s
Pypy	1m 26s
Numpy Dev	16m 24s
Pyarrow Nightly	20m 6s
ubuntu-24.04-arm actions-311.yaml	34m 3s
ubuntu-24.04-arm actions-312.yaml	34m 46s
Future infer strings	45m 24s
ubuntu-24.04 actions-311.yaml	43m 12s
Future infer strings (without pyarrow)	39m 18s
ubuntu-24.04 actions-313.yaml	47m 51s
ubuntu-24.04 actions-312.yaml	45m 51s
Freethreading	20m 53s
ubuntu-24.04-arm actions-313.yaml	34m 19s
Downstream Compat	5m 10s
Locale: it_IT	23m 57s
ubuntu-24.04-arm actions-310.yaml	35m 59s
	16h 22m 2s

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