Request Reviewer and Response Reviewer — two new remotes mount in the Deck

The shell's tiling Deck now shows the whole enrichment pipeline. request-reviewer and response-reviewer join record-collector and prompt-template-manager as federated remotes — scaffolded, wired into the shell, connecting to the workspace, and tiling in pipeline order. The panels are deliberately placeholders: this entry is the federation wiring, not the review UIs. But for the first time the Deck reads end to end — collect, author, pre-flight, post-flight — in one window.