Module workspace 

Git workspace helpers for parallel task isolation.

Responsibilities:

• Re-export workspace path, lifecycle, and remote helpers behind a thin facade.
• Keep crate-facing git workspace APIs stable while delegating focused concerns.
• Centralize module-level invariants for workspace management.

Not handled here:

• Task orchestration, PR workflows, or integration conflict policy.
• Generic filesystem helpers outside workspace lifecycle concerns.

Invariants/assumptions:

• Workspace paths are unique per task ID.
• Clones must be retargeted to a pushable origin remote before use.