Qualify wait states in the coordination graph (CUST-WP-0074-T04)

Task nodes carry wait_kind (external | human | both | unqualified, null
unless wait): the hub field wins, otherwise derived from needs_human and
dependency edges (task-level depends_on, or a workplan dependency row whose
target the task cites). Workplan nodes carry blocked_kind (human | external
| none, null unless blocked). Task-level depends_on becomes a task ->
workplan/task depends_on edge; depends_on edges carry edge_kind commitment
(cyan #0891b2), human gates are marked on the node (humanGate, rose
#be123c). A needs_human=true query / "Needs human" toggle / --needs-human
flag keeps only blocked_kind=human workplans and their human-wait tasks;
the parameter survives in the shareable URL and mode switch like
include_residuals. Fabric stays a read of State Hub.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 237582@bnt-lap001
Assistant-Session: f2b3d9f1-8fb9-4b9c-bc2b-837ec5dfc826

railiance_fabric/server.py

@@ -144,8 +144,13 @@ class RegistryHandler(BaseHTTPRequestHandler):
                     "true",
                     "yes",
                 }
+                needs_human = (_query_optional(query, "needs_human") or "").lower() in {
+                    "1",
+                    "true",
+                    "yes",
+                }
                 return HTTPStatus.OK, coordination_graph_payload(
-                    workplans, tasks, include_residuals=include
+                    workplans, tasks, include_residuals=include, needs_human_only=needs_human
                 )
             return HTTPStatus.OK, fabric_graph_explorer_payload(
                 self.store.combined_graph(),