Circular call results in fatal error: stack overflow

[jiyoonie9]

if i import "ftl/B" inside a go file in A module
and B already depends on A
then this creates a circular dependency.

pulling in this import while just dev is running results in just dev failing with stack overflow error. see error below (the full error is very long)

runtime: goroutine stack exceeds 1000000000-byte limit
runtime: sp=0x140458d4350 stack=[0x140458d4000, 0x140658d4000]
fatal error: stack overflow

runtime stack:
runtime.throw({0x10144c530?, 0x100751d64?})
	runtime/panic.go:1023 +0x40 fp=0x16ff9ad20 sp=0x16ff9acf0 pc=0x10075a2d0
runtime.newstack()
	runtime/stack.go:1103 +0x460 fp=0x16ff9aed0 sp=0x16ff9ad20 pc=0x100776d60
runtime.morestack()
	runtime/asm_arm64.s:341 +0x70 fp=0x16ff9aed0 sp=0x16ff9aed0 pc=0x10078f6e0

goroutine 34438 gp=0x140065a0fc0 m=16 mp=0x14001a0a008 [running]:
runtime.deductAssistCredit(0x10?)
	runtime/malloc.go:1337 +0x7c fp=0x140458d4350 sp=0x140458d4350 pc=0x10072ff5c
runtime.mallocgc(0x10, 0x1021924a0, 0x1)
	runtime/malloc.go:1025 +0xe8 fp=0x140458d43e0 sp=0x140458d4350 pc=0x10072f6c8
runtime.growslice(0x103015d40, 0x1400cc45380?, 0x0?, 0x1400cc3d380?, 0x1021924a0)
	runtime/slice.go:250 +0x4c0 fp=0x140458d4440 sp=0x140458d43e0 pc=0x100774f00
github.com/TBD54566975/ftl/backend/schema.(*Field).schemaChildren(0x1400066dd80)
	github.com/TBD54566975/ftl/backend/schema/field.go:27 +0x70 fp=0x140458d44e0 sp=0x140458d4440 pc=0x100b74d40
github.com/TBD54566975/ftl/backend/schema.Visit.func1()
	github.com/TBD54566975/ftl/backend/schema/visit.go:8 +0x30 fp=0x140458d4520 sp=0x140458d44e0 pc=0x100b923e0
github.com/TBD54566975/ftl/backend/schema.(*Module).Imports.func1({0x1023a2448?, 0x1400066dd80?}, 0x140003db340?)
	github.com/TBD54566975/ftl/backend/schema/module.go:168 +0xd0 fp=0x140458d4560 sp=0x140458d4520 pc=0x100b7cf10
github.com/TBD54566975/ftl/backend/schema.Visit({0x1023a2448, 0x1400066dd80}, 0x1400cc12918)
	github.com/TBD54566975/ftl/backend/schema/visit.go:7 +0x8c fp=0x140458d4590 sp=0x140458d4560 pc=0x100b9237c
github.com/TBD54566975/ftl/backend/schema.Visit.func1()
...