Switch to static export with build-time data fetching

- Change from server-side rendering to static export
- Fetch data at build time and save as JSON
- Remove API routes and tests, use static JSON file
- Switch back to WEB platform from WEB_COMPUTE
- Update build test for static export
- Exclude out directory from security scan
- Much simpler and more reliable approach

terraform/main.tf

@@ -15,7 +15,7 @@ provider "aws" {
 resource "aws_amplify_app" "filamenteka" {
   name       = "filamenteka"
   repository = var.github_repository
-  platform   = "WEB_COMPUTE"
+  platform   = "WEB"
 
   # GitHub access token for private repos
   access_token = var.github_token