feat: implement RAG chatbot service, background cron worker, and asynchronous indexing infrastructure

internal/repositories/rasterTileRepository.go

@@ -61,7 +61,6 @@ func (r *rasterTileRepository) GetTile(ctx context.Context, z, x, y int) ([]byte
 		return nil, "", fmt.Errorf("invalid tile coordinates")
 	}
 
-	// cache key
 	cacheId := fmt.Sprintf("rasterTile:%d:%d:%d", z, x, y)
 
 	var cached []byte

internal/repositories/statisticRepo.go

@@ -224,7 +224,6 @@ func (r *statisticRepository) Upsert(ctx context.Context, date time.Time) (*mode
 
 	entity := mapToEntity(row)
 
-	// Clear search cache and the specific date cache
 	go func() {
 		bgCtx := context.Background()
 		_ = r.c.DelByPattern(bgCtx, "statistic:search*")

internal/repositories/tileRepository.go

@@ -61,7 +61,6 @@ func (r *tileRepository) GetTile(ctx context.Context, z, x, y int) ([]byte, stri
 		return nil, "", false, fmt.Errorf("invalid tile coordinates")
 	}
 
-	// cache key
 	cacheId := fmt.Sprintf("tile:%d:%d:%d", z, x, y)
 
 	var cached []byte