chore(optimizer)!: annotate snowflake ARRAY_APPEND and ARRAY_PREPEND

[fivetran-MichaelLee]

Platform	Supported	Argument Type	Return Type
Snowflake	Yes	array: ARRAY, new_element: any type coercible to array element type	ARRAY
BigQuery	No	N/A	N/A
Redshift	No	N/A	N/A
PostgreSQL	Yes	array: ARRAY, new_element: any compatible type (reversed for ARRAY_PREPEND)	ARRAY
Databricks	Yes	array: ARRAY, new_element: any compatible type	ARRAY
DuckDB	Yes	list: LIST, element: same as other elements in list (reversed for ARRAY_PREPEND)	LIST
TSQL	No	N/A	N/A

[github-actions]

SQLGlot Integration Test Results

Comparing:

• this branch (sqlglot:mlee/annotate-array_fns, sqlglot version: mlee/annotate-array_fns)
• baseline (main, sqlglot version: 28.5.1.dev49)

⚠️ Limited to dialects: snowflake, duckdb

By Dialect

dialect	main	sqlglot:mlee/annotate-array_fns	difference	links
duckdb -> duckdb	4003/4003 passed (100.0%)	4003/4003 passed (100.0%)	No change	full result / delta
snowflake -> duckdb	626/1085 passed (57.7%)	626/1085 passed (57.7%)	No change	full result / delta
snowflake -> snowflake	981/1085 passed (90.4%)	981/1085 passed (90.4%)	No change	full result / delta

Overall

main: 6173 total, 5610 passed (pass rate: 90.9%), sqlglot version: 28.5.1.dev49

sqlglot:mlee/annotate-array_fns: 6173 total, 5610 passed (pass rate: 90.9%), sqlglot version: mlee/annotate-array_fns

Difference: No change