fix: daemon: ensure imports are unaffected by remote-EOF

[ribasushi]

While testing snapshot imports from a cold-start

lotus daemon --remove-existing-chain=true --import-snapshot https://forest-archive.chainsafe.dev/latest/calibnet

I encountered the process aborting with an unexpected

...
2024-10-02T12:10:57.487+0200	INFO	badgerbs	[email protected]/levels.go:1010	[Compactor: 0] Compaction for level: 1 DONE
4.38 GiB / 4.38 GiB [----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------] 100.00% 24.52 MiB p/s 3m3s
2024-10-02T12:11:09.056+0200	WARN	chainstore	store/store.go:670	reorgWorker quit
2024-10-02T12:11:09.058+0200	INFO	badgerbs	[email protected]/db.go:1027	Storing value log head: {Fid:8 Len:32 Offset:276003168}

2024-10-02T12:11:09.190+0200	INFO	badgerbs	[email protected]/levels.go:1000	[Compactor: 173] Running compaction: {level:0 score:1.73 dropPrefixes:[]} for level: 0

2024-10-02T12:11:10.036+0200	INFO	badgerbs	[email protected]/levels.go:962	LOG Compact 0->1, del 5 tables, add 5 tables, took 846.318625ms

2024-10-02T12:11:10.036+0200	INFO	badgerbs	[email protected]/levels.go:1010	[Compactor: 173] Compaction for level: 0 DONE
2024-10-02T12:11:10.036+0200	INFO	badgerbs	[email protected]/db.go:550	Force compaction on level 0 done
ERROR: importing chain failed: failed to read from underlying reader: http2: response body closed

see in-code comment explaining the fix

[masih]

Nice catch, thanks @ribasushi