Clean up: remove Python download scripts, fix linting

- Delete download-geojson.py and download-us-zipcodes.py (use shell script instead)
- Fix ProjectContext: replace 'any' type with proper unknown type and type guard
- Fix SqlLabPage: extract firstSavedQueryId variable for clean dependency tracking
- All linting now passes: 0 errors, 0 warnings

Author: cgivre

exec/java-exec/src/main/resources/webapp/scripts/download-geojson.py

@@ -43,12 +43,15 @@ export function ProjectContextProvider({
     queryKey: ['project', projectId],
     queryFn: () => getProject(projectId),
     enabled: !!projectId,
-    retry: (failureCount, error: any) => {
+    retry: (failureCount, error: unknown) => {
       // Don't retry 404s (project not found) immediately
       // Only retry on network errors or server errors (5xx)
-      if (error?.response?.status === 404) {
-        // Don't retry 404 errors
-        return false;
+      if (error && typeof error === 'object' && 'response' in error) {
+        const httpError = error as { response?: { status?: number } };
+        if (httpError.response?.status === 404) {
+          // Don't retry 404 errors
+          return false;
+        }
       }
       // Retry up to 3 times for other errors
       return failureCount < 3;

exec/java-exec/src/main/resources/webapp/scripts/download-us-zipcodes.py

@@ -537,11 +537,12 @@ export default function SqlLabPage({ datasetFilter, headerContent, projectId, sa
   }, [locationState, updateSql, dispatch, activeTabId]);
 
   // Load saved queries for the project
+  const firstSavedQueryId = savedQueryIds?.[0];
   useEffect(() => {
-    if (projectId && savedQueryIds && savedQueryIds.length > 0) {
+    if (projectId && firstSavedQueryId) {
       // Import here to avoid circular dependency
       import('../api/savedQueries').then(({ getSavedQuery }) => {
-        getSavedQuery(savedQueryIds[0])
+        getSavedQuery(firstSavedQueryId)
           .then((query) => {
             updateSql(query.sql);
             if (query.defaultSchema) {
@@ -557,7 +558,7 @@ export default function SqlLabPage({ datasetFilter, headerContent, projectId, sa
           });
       });
     }
-  }, [projectId, savedQueryIds?.[0], activeTabId, updateSql, dispatch]);
+  }, [projectId, firstSavedQueryId, activeTabId, updateSql, dispatch]);
 
   // Handle format SQL
   const handleFormat = useCallback(() => {