refactor: split oversized files into focused modules (ALIEN-291)

.github/workflows/ci-fast.yml

@@ -133,6 +133,9 @@ jobs:
       - name: Lint
         run: pnpm format-and-lint
 
+      - name: Enforce max source file length
+        run: scripts/check-max-lines.sh
+
       - name: TypeScript typecheck
         env:
           NODE_OPTIONS: "--max-old-space-size=8192"

.github/workflows/ci-fork.yml

@@ -84,6 +84,9 @@ jobs:
       - name: Lint
         run: pnpm format-and-lint
 
+      - name: Enforce max source file length
+        run: scripts/check-max-lines.sh
+
       - name: TypeScript typecheck
         env:
           NODE_OPTIONS: "--max-old-space-size=8192"

crates/alien-aws-clients/src/aws/AGENTS.md

@@ -5,4 +5,4 @@
 3. Implement core operations only: OK to skip optional fields/features, but all required fields must be present for compatibility
 4. Map service errors: Check AWS docs "Common Errors" section and map to `RemoteResourceNotFound`, `AuthenticationError`, `RateLimitExceeded`, etc
 5. Use infrastructure: `.aws_sign_v4()` for auth, `.aws_error_for_status()` for errors, support `service_endpoint_overrides`
-6. Add comprehensive tests: Create `tests/aws_[servicename]_client_tests.rs`, follow existing test patterns
+6. Add comprehensive tests: Create `tests/aws_[servicename]_client_tests.rs`, follow existing test patterns (s3's tests live in the `tests/aws_s3_client_tests/` directory module, split by topic because of their size)