Initial GeoIntel V1 foundation

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+# Pass 06 — Raster and Vector Metadata Foundation
+
+## Goal
+
+Add first geospatial metadata services.
+
+## Implement
+
+- GeoJSON/vector metadata extraction using GeoPandas/Shapely where available.
+- Raster metadata service interface using Rasterio where available.
+- Controlled unavailable-state if Rasterio/GDAL is not installed.
+- Metadata endpoint connected to dataset records.
+- Fixture-driven tests.
+
+## Constraints
+
+- Do not fake metadata as real processing.
+- Unsupported file types must produce controlled errors.
+- Keep CRS/bounds/resolution fields explicit.
+
+## Validation
+
+- Vector metadata tests pass.
+- Raster service imports or unavailable-state test passes.
+- API contract remains stable.
+
+## Acceptance
+
+- Demo GeoJSON fixture returns deterministic metadata.
+- Dataset metadata can be retrieved.
+- Execution log updated.