feat(campaign): expose governed archive action

src/govoplan_campaign/backend/documentation.py

@@ -569,14 +569,13 @@ CAMPAIGN_USER_DOCUMENTATION = (
         steps=(
             "Open Report and resolve every active or outcome-unknown delivery state.",
             "Confirm that the campaign should leave active work while its evidence remains retained.",
-            "Invoke the authorized Archive action from a supporting client.",
+            "Open the campaign overview, choose Archive campaign, and confirm the retained-evidence consequence.",
             "Reopen or query the campaign and confirm its state is Archived.",
         ),
         outcome="An archived campaign whose versions, reports, and audit evidence remain preserved.",
         verification="The campaign state is Archived and its report remains available. Ask an authorized audit reader to verify the platform audit event.",
         related_topic_ids=("campaigns.workflow.view-delivery-report", "campaigns.workflow.delete-untouched-draft"),
         limitations=(
-            "The current Campaign Web UI does not yet expose the archive action; use an authorized supporting client or API.",
             "The Campaign-local Audit page is not integrated yet; audit verification uses the platform audit surface or API.",
         ),
     ),