feat(kanban): add initial-status for human-ops cards

Salvages #27526 by @shunsuke-hikiyama. Adds an --initial-status flag
(running|blocked, default running) to 'kanban create', threaded through
kanban_db.create_task() and the kanban_create tool schema. 'blocked'
parks the task directly in the blocked column for R3 human-ops review,
skipping the brief running-to-blocked transition.

Dropped the unrelated 'add' alias, WIFEXITED Windows compat, and
slash-handler error formatting changes that were bundled in the
original PR — those should ship as their own focused changes if still
wanted.

tools/kanban_tools.py

@@ -632,6 +632,7 @@ def _handle_create(args: dict, **kw) -> str:
         return tool_error(bool_error)
     idempotency_key = args.get("idempotency_key")
     max_runtime_seconds = args.get("max_runtime_seconds")
+    initial_status = args.get("initial_status") or "running"
     skills = args.get("skills")
     if isinstance(skills, str):
         # Accept a single skill name as a string for convenience.
@@ -666,6 +667,7 @@ def _handle_create(args: dict, **kw) -> str:
                     if max_runtime_seconds is not None else None
                 ),
                 skills=skills,
+                initial_status=str(initial_status),
                 created_by=os.environ.get("HERMES_PROFILE") or "worker",
             )
             new_task = kb.get_task(conn, new_tid)
@@ -1077,6 +1079,16 @@ KANBAN_CREATE_SCHEMA = {
                     "task with outcome='timed_out'."
                 ),
             },
+            "initial_status": {
+                "type": "string",
+                "enum": ["running", "blocked"],
+                "description": (
+                    "Initial card status. Use 'blocked' for tasks that "
+                    "require immediate human ops (R3 gate) to skip the "
+                    "brief running-to-blocked transition. Defaults to "
+                    "'running', which preserves the usual dispatch path."
+                ),
+            },
             "skills": {
                 "type": "array",
                 "items": {"type": "string"},