[lake] Optimize TableLookup finder creation

[KiteSoar]

Purpose

Linked issue: close #2521

Brief change log

• Enhance TableLookup.createLookuper() to intelligently route lookup requests:
  • Create PrimaryKeyLookuper when lookup columns match primary key
  • Create PrefixKeyLookuper when lookup columns are valid prefix key
  • Fail-fast with clear error message for invalid lookup columns

Tests

• Add TableLookupTest with 10 test cases covering:
  • Primary key lookup (with/without lookupBy, partitioned/non-partitioned)
  • Prefix key lookup (single/multiple columns, partitioned/non-partitioned)
  • Invalid inputs (out-of-order, empty, non-primary/non-prefix columns)
  • Log table rejection

API and Format

None

Documentation

None