Added logic to throw exception when the user tries to use -force-no-c…

[subkanthi]

2_date_cols.parquet: processing
2026-01-13 08:01:47 [-6-thread-1] WARN c.a.i.c.internal.cmd.Insert > 2_date_cols.parquet: File contains multiple partition values for 'end_date' (min: 20468, max: 20512). Falling back to full scan (slow)
2026-01-13 08:01:47 [-6-thread-1] INFO c.a.i.c.internal.cmd.Insert > 2_date_cols.parquet: partitioning
2026-01-13 08:01:47 [-6-thread-1] INFO c.a.i.c.internal.cmd.Insert > 2_date_cols.parquet: adding data file: s3://bucket1/test/test12/data/end_date_day=2026-01-15/1768312907036-39a60eac0b0284c15751e9494ca3b1e59eb909cd09cc6d0b4b35075721be9863-part.parquet
2026-01-13 08:01:47 [-6-thread-1] INFO c.a.i.c.internal.cmd.Insert > 2_date_cols.parquet: adding data file: s3://bucket1/test/test12/data/end_date_day=2026-02-28/1768312907036-39a60eac0b0284c15751e9494ca3b1e59eb909cd09cc6d0b4b35075721be9863-part.parquet
2026-01-13 08:01:47 [main] INFO o.a.i.SnapshotProducer > Committed snapshot 2985048395570678302 (MergeAppend)

--force-no-copy

2026-01-13 08:02:35 [-6-thread-1] INFO c.a.i.c.internal.cmd.Insert > 2_date_cols.parquet: processing
2026-01-13 08:02:35 [main] ERROR com.altinity.ice.cli.Main > Fatal
java.io.IOException: Error processing file(s)
	at com.altinity.ice.cli.internal.cmd.Insert.run(Insert.java:231)
	at com.altinity.ice.cli.Main.insert(Main.java:447)
	at com.altinity.ice.cli.Main.lambda$1(Main.java:692) [9 skipped]
	at com.altinity.ice.cli.Main.main(Main.java:699) [1 skipped]
Caused by: java.io.IOException: Error processing 2_date_cols.parquet
	at com.altinity.ice.cli.internal.cmd.Insert.lambda$run$2(Insert.java:215)
 [4 skipped]
Caused by: org.apache.iceberg.exceptions.BadRequestException: 2_date_cols.parquet: File contains multiple partition values for 'end_date' (min: 20468, max: 20512). In no-copy mode, each file must contain data for only one partition value
	at com.altinity.ice.cli.internal.cmd.Insert.processFile(Insert.java:430)
	at com.altinity.ice.cli.internal.cmd.Insert.lambda$run$2(Insert.java:194)
	... 4 common frames omitted

[xieandrew]

Looks good to me