docs: fix Parquet type table — remove false INT96 claim, add FIXED_LEN_BYTE_ARRAY

INT96 was documented as "Converted to int64" but the code has no case for
physical type 3 — it falls through to binary. Removed the false claim.
Added FIXED_LEN_BYTE_ARRAY (physical type 7) which is handled but wasn't
documented.

Author: teamchong

docs/src/content/docs/formats.mdx

@@ -39,7 +39,7 @@ const result = await qm
 | BOOLEAN | `bool` | |
 | BYTE_ARRAY (UTF8) | `utf8` | |
 | BYTE_ARRAY | `binary` | |
-| INT96 (timestamp) | `int64` | Converted |
+| FIXED_LEN_BYTE_ARRAY | `binary` | UUIDs, decimals |
 
 ### Compression