fix: forward types in pgTypeToGoType array fallback so enum arrays resolve to []string

[oniani1]

pgTypeToGoType recurses through the array branch with only (pgType, nullable), so the third argument defaults to []. Inner enums and composites then can't be resolved and fall through to interface{}, even though the same enum resolves to string outside an array.

This forwards types to the recursive call.

Added test/server/templates/go.test.ts with three cases: non-nullable array of enum should be []string, nullable array of enum should be []*string, and plain text[] continues to be []string. Calls apply with mock GeneratorMetadata so the test runs without Docker.

Closes #1073

[avallete]

Thank's for your contribution !