Three bugs that I don't know how to reproduce or fix

[alecthomas]

@michaelneale cloned down the ftl-examples and was unable to build the online-boutique for reasons that are not clear. I fixed a bunch of issues, but hit two weird bugs that are reproducible in this branch.

Bugs are:

1. We get the message warn: "checkout" build skipped because its dependency "shipping" failed to build even though shipping hasn't failed in any visible way.
2. We get error: initial deploy failed: 14:3-3: ingress verb getQuote: couldn't resolve response body type currency.Money
3. There's also a meta bug in that "initial deploy failed" doesn't tell me which file the failure is occurring in.

🐚 ~/dev/ftl-examples $ ftl dev online-boutique/backend --recreate
info: Starting FTL with 1 controller(s)
info:currency: Building module
info:cart: Building module
info:ad: Building module
info:ad: Deploying module
info:currency: Deploying module
info:cart: Deploying module
info:payment: Building module
info:shipping: Building module
info:productcatalog: Building module
info:payment: Deploying module
warn: "checkout" build skipped because its dependency "shipping" failed to build
info:recommendation: Building module
info:productcatalog: Deploying module
info:recommendation: Deploying module
info:controller0: Deployed dpl-ad-1m5ckbhogm6feil5
info:controller0: Deployed dpl-currency-1flmrlirote5ta9r
info:controller0: Deployed dpl-recommendation-58ikzredh79ww5d6
info:controller0: Deployed dpl-payment-9n2robh5f3vfo4w
info:controller0: Deployed dpl-productcatalog-099pwzdrb9zvpkq
info:controller0: Deployed dpl-cart-23tfpvcga9c6l85r
info: Modules waiting to build: shipping, checkout
error: initial deploy failed: 14:3-3: ingress verb getQuote: couldn't resolve response body type currency.Money