feat(01-02): add migration-target Protocols for vio/gpr/satellite_matcher/mavlink_io/coordinate_transforms (ARCH-05)

- VisualOdometry mirrors ISequentialVisualOdometry (4 methods)
- GlobalPlaceRecognition mirrors IGlobalPlaceRecognition (7 methods)
- SatelliteTileLoader mirrors SatelliteDataManager public API (11 methods)
- MetricRefiner mirrors IMetricRefinement (6 methods)
- MAVLinkBridgeProtocol mirrors MAVLinkBridge public API (8 methods)
- CoordinateTransformsProtocol mirrors CoordinateTransformer (9 methods)
- All Protocols runtime_checkable; backwards-compat I-prefixed aliases
  exposed for vio/gpr/metric (deprecated in Phase 2)
- Pure-additive: zero existing files touched
- isinstance check confirms SatelliteDataManager and CoordinateTransformer
  already satisfy the new Protocols structurally

src/gps_denied/components/vio/protocol.py

@@ -0,0 +1,35 @@
+"""Protocol surface for the VIO component (ARCH-05).
+
+Phase 1: defines the Protocol that concrete adapters in this directory
+implement. Method signatures mirror ``ISequentialVisualOdometry`` from
+``core/vo.py``. Adapters are NOT moved here yet — see Plan 04 (VIO).
+"""
+from __future__ import annotations
+
+from typing import Protocol, runtime_checkable
+
+import numpy as np
+
+from gps_denied.schemas import CameraParameters
+from gps_denied.schemas.vo import Features, Matches, Motion, RelativePose
+
+
+@runtime_checkable
+class VisualOdometry(Protocol):
+    """Sequential visual odometry surface (mirrors ISequentialVisualOdometry)."""
+
+    def compute_relative_pose(
+        self, prev_image: np.ndarray, curr_image: np.ndarray, camera_params: CameraParameters
+    ) -> RelativePose | None: ...
+
+    def extract_features(self, image: np.ndarray) -> Features: ...
+
+    def match_features(self, features1: Features, features2: Features) -> Matches: ...
+
+    def estimate_motion(
+        self, matches: Matches, camera_params: CameraParameters
+    ) -> Motion | None: ...
+
+
+# Backwards-compat alias — Phase 2 will deprecate the I-prefix.
+ISequentialVisualOdometry = VisualOdometry