bug: managed deploy does not include .git, so submodule repos fail

[isshaddad]

Provide environment information

n/a

Describe the bug

Managed Deploy checks out files but not Git metadata (.git). In repos that use git submodules for workspace packages, git submodule update --init --recursive fails with “not a git repository”, then install fails because submodule paths are missing.
Expected: recursive submodule checkout support, or include .git so pre-build can initialize submodules.

Reproduction repo

n/a

To reproduce

1. Use any monorepo that references workspace packages inside git submodules.
2. Configure Managed Deploy.
3. Set install/pre-build command to:
   git submodule update --init --recursive && bun install
4. Deploy.
5. Observe: .gitmodules exists, .git is missing, submodule init fails, then workspace-not-found errors.

Additional information

No response