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

core/schema/models/stage.py

@@ -35,6 +35,16 @@ class StageIO:
     optional_reads: List[str] = field(default_factory=list)
 
 
+@dataclass
+class TransformOption:
+    """A transform the stage accepts on its incoming edges."""
+    key: str
+    type: str          # "bool", "float", "int", "str"
+    default: Any = False
+    label: str = ""
+    description: str = ""
+
+
 @dataclass
 class StageOutputHint:
     """How to render a stage output in the compare/editor views."""
@@ -55,6 +65,7 @@ class StageDefinition:
     io: StageIO = field(default_factory=StageIO)
     config_fields: List[StageConfigField] = field(default_factory=list)
     output_hints: List[StageOutputHint] = field(default_factory=list)
+    accepted_transforms: List[TransformOption] = field(default_factory=list)
     tracks_element: Optional[str] = None
 
 
@@ -129,10 +140,16 @@ class StageRef:
 
 @dataclass
 class Edge:
-    """Connection between stages in the graph."""
+    """Connection between stages in the graph.
+
+    transform: per-edge data transformation spec. Flexible JSONB blob
+    type-checked by the consuming stage. E.g. {"invert_mask": true}
+    tells edge detection to invert the field segmentation mask.
+    """
     source: str
     target: str
     condition: str = ""
+    transform: Dict[str, Any] = field(default_factory=dict)
 
 
 @dataclass
@@ -151,6 +168,7 @@ STAGE_VIEWS = [
     StageConfigField,
     StageIO,
     StageOutputHint,
+    TransformOption,
     StageDefinition,
     FrameExtractionConfig,
     SceneFilterConfig,