dhpk-cli-dispatch-contextlisted

# Internal CLI dispatch context Build the canonical Provider-neutral dispatch request before an external adapter starts a Provider. The existing `dhpk.cli.context.v1` descriptor is a compatibility projection at the transport boundary. Use the canonical role resolver with the requested Provider and mode; retain both requested and effective Role identity, and preserve the resolver's one-per-session alias diagnostic. Accept canonical configuration ahead of its declared legacy key. Bind Codex to `codex-exec` plus prompt stdin, and AGY to `agy-print` plus bounded confirmation stdin. A missing or contradictory provider, role, mode, transport, path, or scope descriptor is `BLOCKED`; this builder never derives authority or supplies an implicit path. The canonical request/receipt pair is `dhpk.dispatch.request.v2` / `dhpk.dispatch.receipt.v2`; the v1 context and receipt remain explicit, observable compatibility formats until all external adapters consume v2 directly. The builder returns an immutable value. It writes only through an explicit trusted writer with an explicit context path. That writer must atomically create a regular, non-symlink JSON file with mode `0600`; no default filesystem writer is provided by this package. The repository-owned launcher is executable at `scripts/launch-cli-dispatch.js`. Its public interface requires explicit `--dispatching-agent`, `--execution-provider`, `--requested-role`, `--mode`, `--task-id`, `--attempt-id`, `--workdir`, `--prompt`, and `-