components assesment #2

add 2.15_components_assesment.md step

docs/02_components/08_global_place_recognition/global_place_recognition_spec.md

@@ -205,18 +205,19 @@ List[TileCandidate]  # Re-ranked list
 
 ### `initialize_database(satellite_tiles: List[SatelliteTile]) -> bool`
 
-**Description**: Initializes satellite descriptor database during system startup.
+**Description**: Loads pre-built satellite descriptor database. **Note**: Semantic index building (DINOv2 descriptors) is performed by the satellite provider service, not during system startup.
 
 **Called By**:
-- F02 Flight Manager (during system initialization)
+- F02 Flight Processor (during system initialization)
 
 **Input**:
 ```python
 List[SatelliteTile]:
     tile_id: str
-    image: np.ndarray
+    image: np.ndarray  # Optional - only if building index locally
     gps_center: GPSPoint
     bounds: TileBounds
+    descriptor: Optional[np.ndarray]  # Pre-computed descriptor from provider
 ```
 
 **Output**:
@@ -225,19 +226,31 @@ bool: True if database initialized successfully
 ```
 
 **Processing Flow**:
-1. For each satellite tile:
-   - compute_location_descriptor(tile.image) → descriptor
-   - Store descriptor with tile metadata
-2. Build Faiss index using H04 Faiss Index Manager
-3. Persist index to disk for fast startup
+1. **Load pre-built index**: Satellite provider provides pre-computed DINOv2 descriptors
+2. If descriptors provided:
+   - Load descriptors directly
+   - Build Faiss index using H04 Faiss Index Manager
+3. If descriptors not provided (fallback):
+   - For each satellite tile:
+     - compute_location_descriptor(tile.image) → descriptor
+     - Store descriptor with tile metadata
+   - Build Faiss index
+4. Persist index to disk for fast startup
+
+**Satellite Provider Integration**:
+- **Primary**: Satellite provider builds semantic index offline
+- Provider exposes index via API or file download
+- F08 loads pre-built index at startup
+- **Fallback**: F08 can build index locally if provider doesn't supply it
 
 **Performance**:
-- Initialization time: ~10-30 minutes for 10,000 tiles (one-time cost)
-- Can be done offline and loaded at startup
+- **Load pre-built index**: <10 seconds (fast startup)
+- **Build index locally**: ~10-30 minutes for 10,000 tiles (fallback only)
 
 **Test Cases**:
-1. **Initialize with 1000 tiles**: Completes successfully
-2. **Load pre-built index**: Fast startup (<10s)
+1. **Load pre-built index**: Completes successfully, fast startup
+2. **Fallback local building**: Builds index if provider doesn't supply it
+3. **Index query**: Works correctly after loading
 
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