phase 5: edge transforms, soleprint-ui rename, infra fixes

- pipeline edge transforms: stages can declare accepted_transforms,
  edges carry a transform dict, runner injects per-stage and nodes
  apply (e.g. invert_mask before edge detection); editable from UI
  via PUT /config/edge-transform
- rename mpr-ui-framework -> soleprint-ui (now an external package
  synced via .spr from /home/mariano/wdir/spr); add @vue-flow/core
  and uplot to detection-app so linked package resolves them
- Tiltfile guards kubectl context, k8s commands pin --context kind-mpr
- kind-config: gateway on hostPort 30080 (Caddy fronts mpr.local.ar)
- modelgen: pyproject.toml, .spr marker, dict default_factory support

modelgen/generator/pydantic.py

@@ -328,7 +328,12 @@ class PydanticGenerator(BaseGenerator):
         if isinstance(default, Enum):
             return f" = {default.__class__.__name__}.{default.name}"
         if callable(default):
-            return " = Field(default_factory=list)" if "list" in str(default) else ""
+            default_str = str(default)
+            if "list" in default_str:
+                return " = Field(default_factory=list)"
+            if "dict" in default_str:
+                return " = Field(default_factory=dict)"
+            return ""
         return f" = {default!r}"
 
     def _generate_from_config(self, config) -> str: