refactor(config): slim resolver facade and expand regression lanes

Collapse src/config/resolve.ts into an orchestrated pipeline over domain modules, wire launcher regression coverage into test scripts, and sync backlog/subagent tracking artifacts for completed TASK-74/TASK-96/TASK-98 follow-up planning.

docs/launcher-script.md

@@ -95,3 +95,11 @@ Use `subminer <subcommand> -h` for command-specific help.
 - Default log level is `info`
 - `--background` mode defaults to `warn` unless `--log-level` is explicitly set
 - `--dev` / `--debug` control app behavior, not logging verbosity — use `--log-level` for that
+
+## Testing
+
+Run launcher regression tests (config discovery + command branching):
+
+```bash
+bun run test:launcher
+```