Revise the Seriatim plan and workspace conventions

docs/orientation.md

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+# Workspace Orientation
+
+## Repository Map
+
+Repositories inside this directory:
+
+- `ansible-collection-dnd`: the `rakestraw.dnd` collection that bundles and
+  distributes the pipeline suite.
+- `ansible-role-dnd-pipeline`: independent source repository for the
+  suite-level role exposed by the collection as `rakestraw.dnd.pipeline`.
+- `ansible-role-{narratio,notarius,audita,seriatim,scriptorium}`: standalone
+  application roles.
+- `rakestraw-ansible`: working deployment repository containing the
+  `pipeline_dnd` proof of concept; treat it as read-only reference unless the
+  task explicitly includes it.
+
+Relevant upstream repositories are siblings of this directory:
+
+- `../{narratio,notarius,audita,seriatim,scriptorium}`: application source and
+  authoritative application contracts.
+- `../narratio-prompts`: pipeline prompt-library content.
+
+Use [the workspace inventory](../workspace.yml) as the complete
+machine-readable inventory of paths and remotes.
+
+## Sources of Truth
+
+- [Workspace conventions](conventions.md): normative working and Ansible house
+  style.
+- [Planning policy](planning.md): normative feature planning and progress
+  workflow.
+- [MVP roadmap](roadmap/mvp.md): settled MVP scope, architecture, and open
+  design work.
+- [Feature roadmaps](roadmap/features/): durable scope and target state for
+  selected units of work.
+- [Workspace status](status.md): current cross-repository progress and next
+  work.
+- [Decision records](decisions/): durable rationale for significant
+  architectural choices.
+- [Implementation plan](roadmap/implementation.md): the fixed location for the
+  active staged plan or, when no plan is approved, a pending-plan notice.
+- Application repositories: CLI, configuration, build, and integration
+  contracts.
+- Individual Ansible repositories: implementation and repository-local tests.