chore: dev remote stack as default (for full feature support)

[voarsh2]

chore: dev remote stack as default (for full feature support) - bindmount checkout is "opt-in" - new default gives exposes all services in local/remote compat setting - repos stored in /dev-workspace - repo meta in bindmount /.codebase

Motivation:
I swapped the default docker-compose.yml to the “remote-dev / full experience” stack because it better matches server/client semantics and is safer by default.

• Old default compose was a checkout bind-mount (.:/work). That makes collection/repo cleanup and any deletion behavior risky because it’s operating directly on a real working tree and doesn’t match upload-service semantics.
• New default compose uses a workspace dir (e.g. ./dev-workspace) as /work and keeps repo metadata in ./.codebase, which matches the intended model (repos live under dev-workspace, metadata under .codebase) and is safer for destructive operations.
• I kept the old behavior available as docker-compose-bindmount-checkout.yml for anyone relying on it.
• Also added QWEN3_* env vars to both compose files for parity.