refactor(remote-connect): migrate command orchestration owner

[limityan]

Summary

• Move remote workspace, session, initial-sync, poll, and tool/question interaction command orchestration into bitfun-services-integrations.
• Keep concrete runtime ownership in core through CoreServiceAgentRuntime host adapters for workspace service, persistence/session restore, coordinator, tracker, model catalog, and user-input manager.
• Update decomposition docs and boundary checks so the migrated owner split is explicit and does not imply remote-SSH, terminal, scheduler, workspace-root, or persistence runtime migration.

Behavior and Risk Notes

• This is intended as a structure-only migration: response shapes, poll dirty-state behavior, default reject/cancel reasons, session/workspace error boundaries, and AnswerQuestion routing are preserved.
• Added focused contract tests around workspace/session/poll/interaction owner handlers and a core regression test that keeps AnswerQuestion independent of global coordinator readiness.
• No product feature set, build script, CI coverage, or release shape changes are included.

Validation

• cargo test -p bitfun-services-integrations --features remote-connect -- --nocapture
• cargo test -p bitfun-core --features product-full remote_connect -- --nocapture
• cargo check --workspace
• node scripts\check-core-boundaries.mjs
• git diff --check gcwing/main..HEAD

cargo check --workspace still reports the existing unrelated desktop warning for parse_clipboard_path_segments in clipboard_file_api.rs.