find table is case-sensitive — Snowflake identifiers should be normalised to uppercase

[Warhorze]

sqlcg find table wtfs_voorraad_week returns no results. sqlcg find table <table_name> works. Snowflake normalises unquoted identifiers to uppercase at parse time, so the tool should do the same on both index and lookup. A user querying in lowercase (the natural way to type) always gets nothing. Fix: uppercase all unquoted identifiers during indexing and normalise the lookup input before querying the graph.

[Warhorze]

Not yet fixed. Tracked in ARCHITECTURE_REVIEW.md for a future sprint. The fix is to uppercase unquoted identifiers during both indexing and lookup — sqlglot dialect normalization should handle this without much custom code.

[Warhorze]

Confirming this is still open — no case normalization exists in the codebase. Identifiers are stored and queried as-is. Tracked in the backlog at #15.