database and migrations

SatelliteProvider.DataAccess/Migrations/001_CreateTilesTable.sql

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+CREATE TABLE tiles (
+    id UUID PRIMARY KEY,
+    zoom_level INT NOT NULL,
+    latitude DOUBLE PRECISION NOT NULL,
+    longitude DOUBLE PRECISION NOT NULL,
+    tile_size_meters DOUBLE PRECISION NOT NULL,
+    tile_size_pixels INT NOT NULL,
+    image_type VARCHAR(10) NOT NULL,
+    maps_version VARCHAR(50),
+    file_path VARCHAR(500) NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+

SatelliteProvider.DataAccess/Migrations/002_CreateRegionsTable.sql

@@ -0,0 +1,15 @@
+CREATE TABLE regions (
+    id UUID PRIMARY KEY,
+    latitude DOUBLE PRECISION NOT NULL,
+    longitude DOUBLE PRECISION NOT NULL,
+    size_meters DOUBLE PRECISION NOT NULL,
+    zoom_level INT NOT NULL,
+    status VARCHAR(20) NOT NULL,
+    csv_file_path VARCHAR(500),
+    summary_file_path VARCHAR(500),
+    tiles_downloaded INT DEFAULT 0,
+    tiles_reused INT DEFAULT 0,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+

SatelliteProvider.DataAccess/Migrations/003_CreateIndexes.sql

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+CREATE INDEX idx_tiles_composite ON tiles(latitude, longitude, tile_size_meters);
+CREATE INDEX idx_tiles_zoom ON tiles(zoom_level);
+CREATE INDEX idx_regions_status ON regions(status);
+