refactor(transfer): complete durable recovery state machine

tests/fixtures/architecture/dependency-baseline.json

@@ -1442,7 +1442,7 @@
     }
   },
   "edge_count": 6898,
-  "edge_sha256": "c73faf7e29ee12a862cf2332f1803fd4eb8a3f4d2994ed81075ff198e896f8df",
+  "edge_sha256": "9bceb8aaa1bb5857ba6ee075c50214455cfb4f59030cee49b3e5af751cc95972",
   "edges": [
     "app -> app.runtime",
     "app -> app.runtime.compat",
@@ -4450,7 +4450,6 @@
     "app.application.transfer.workflow -> app.adapters.system",
     "app.application.transfer.workflow -> app.adapters.system.host",
     "app.application.transfer.workflow -> app.application",
-    "app.application.transfer.workflow -> app.application.agent",
     "app.application.transfer.workflow -> app.application.transfer",
     "app.application.transfer.workflow -> app.application.transfer.execution",
     "app.application.transfer.workflow -> app.domain",
@@ -5187,6 +5186,7 @@
     "app.db.adapters.transfer.execution -> app.application",
     "app.db.adapters.transfer.execution -> app.application.transfer",
     "app.db.adapters.transfer.execution -> app.application.transfer.execution",
+    "app.db.adapters.transfer.execution -> app.application.transfer.workflow",
     "app.db.adapters.transfer.execution -> app.db",
     "app.db.adapters.transfer.execution -> app.db.models",
     "app.db.adapters.transfer.execution -> app.db.models.transferexecutionstep",

tests/fixtures/architecture/mypy-baseline.json

@@ -1568,19 +1568,19 @@
     "union-attr": 2
   },
   "app/chain/transfer.py": {
-    "arg-type": 57,
+    "arg-type": 53,
     "assignment": 25,
     "attr-defined": 4,
     "func-returns-value": 1,
     "misc": 2,
-    "no-any-return": 3,
+    "no-any-return": 2,
     "no-untyped-call": 8,
     "no-untyped-def": 12,
     "operator": 3,
     "return-value": 2,
     "truthy-function": 5,
     "type-arg": 10,
-    "union-attr": 33,
+    "union-attr": 31,
     "var-annotated": 4
   },
   "app/chain/user.py": {