feat(P2+P3): IHF Phase 2 complete; register Phase 3 workplan

Phase 2 — Structured Feedback and Triage (IHUB-WP-0002):
- Schema: annotation_threads, requirement_candidates, triage_states,
  reviewer_assignments; annotations extended with severity + thread_id
- AnnotationThreadsController: create threads, assign annotations
- RequirementCandidatesController: CRUD, escalation, triage lifecycle,
  reviewer assignment, my-queue
- Annotation severity (low/medium/high/critical) with Tailwind color cues
- TriageDashboardAction on HubsController with autoRefresh
- Integration tests (T01–T09), SCOPE.md updated, docs/phase2-summary.md

Phase 3 — Governance and Decision Linkage (IHUB-WP-0003):
- Workplan registered: 9 tasks, State Hub workstream 5f201ee3

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/View/Annotations/New.hs

@@ -29,16 +29,25 @@ renderForm :: Annotation -> Id Widget -> Html
 renderForm annotation widgetId = formFor annotation [hsx|
     {(textareaField #body) { fieldLabel = "Comment" }}
     {selectField #category categoryOptions}
+    {selectField #severity severityOptions}
     {submitButton}
 |]
 
 categoryOptions :: [(Text, Text)]
 categoryOptions =
-    [ ("Friction",        "friction")
-    , ("Defect",          "defect")
-    , ("Wish",            "wish")
-    , ("Policy Concern",  "policy_concern")
+    [ ("Friction",          "friction")
+    , ("Defect",            "defect")
+    , ("Wish",              "wish")
+    , ("Policy Concern",    "policy_concern")
     , ("Documentation Gap", "doc_gap")
-    , ("Trust",           "trust")
-    , ("Other",           "other")
+    , ("Trust",             "trust")
+    , ("Other",             "other")
+    ]
+
+severityOptions :: [(Text, Text)]
+severityOptions =
+    [ ("Low",      "low")
+    , ("Medium",   "medium")
+    , ("High",     "high")
+    , ("Critical", "critical")
     ]