docs: redefine approval workflow

docs/TASKS/approval-workflow/001-define-approval-workflow.md

@@ -0,0 +1,46 @@
+# Task: Define approval workflow
+
+## Feature
+
+`docs/FEATURES/approval-workflow.md`
+
+## Goal
+
+Define the v1 approval workflow behavior for `ContentItem` approval.
+
+## Context
+
+Approval workflow has been split from production workflow. The object being approved is a `ContentItem`, and workspaces configure approval behavior without defining a fully custom state machine.
+
+## Scope
+
+- Define approval modes.
+- Define approval actors.
+- Define approval decisions.
+- Define the state transitions affected by approval.
+- Define notification and audit side effects.
+- Define open questions that remain outside v1.
+
+## Constraints
+
+- Documentation-only task.
+- Do not change backend or frontend code.
+- Keep production workflow details out of this task except where needed to explain boundaries.
+
+## Done When
+
+- [ ] approval modes are defined
+- [ ] actor permissions are defined
+- [ ] approval decisions are defined
+- [ ] state transition behavior is defined
+- [ ] workspace configuration fields are described
+- [ ] notification side effects are listed
+- [ ] audit requirements are listed
+- [ ] out-of-scope production behavior is explicitly separated
+
+## Validation Commands
+
+```bash
+git diff -- docs/FEATURES docs/TASKS
+```
+