ENH: Improved error message and raise new error for small-string NaN edge case in HDFStore.append #21757

Job	Run time
Pyodide build	11m 17s
Linux-32-bit	10m 58s
python-freethreading	11m 18s
Linux-Musl	11m 6s
python-dev (macOS-13)	11m 22s
python-dev (macOS-14)	11m 23s
python-dev (ubuntu-22.04)	11m 19s
python-dev (windows-latest)	11m 9s
macos-13 actions-310.yaml	11m 25s
macos-13 actions-311.yaml	11m 29s
macos-13 actions-312.yaml	11m 27s
macos-14 actions-310.yaml	11m 23s
macos-14 actions-311.yaml	11m 23s
macos-14 actions-312.yaml	11m 23s
windows-latest actions-311.yaml	11m 16s
windows-latest actions-312.yaml	11m 9s
windows-latest actions-310.yaml	11m 15s
Minimum Versions	11m 19s
Future infer strings (without pyarrow)	16m 3s
Locale: zh_CN	11m 19s
Locale: it_IT	11m 19s
Downstream Compat	5m 46s
Numpy Dev	11m 16s
Pyarrow Nightly	11m 20s
Future infer strings	16m 3s
Pypy	1m 15s
ubuntu-22.04 actions-310.yaml	15m 59s
ubuntu-22.04 actions-311.yaml	16m 2s
ubuntu-22.04 actions-312.yaml	16m 1s
ubuntu-24.04-arm actions-311.yaml	3s
ubuntu-24.04-arm actions-312.yaml	16m 3s
ubuntu-24.04-arm actions-310.yaml	16m 3s
	6h 7m 53s

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