Merge branch 'feature/transparent-proxy' into 'main'

Add transparent PyPI proxy and improve upstream sources UI

Closes #108

See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!56

backend/app/pypi_proxy.py

@@ -156,7 +156,10 @@ async def pypi_simple_index(
 
             simple_url = source.url.rstrip('/') + '/simple/'
 
-            timeout = httpx.Timeout(PROXY_READ_TIMEOUT, connect=PROXY_CONNECT_TIMEOUT)
+            timeout = httpx.Timeout(
+                connect=PROXY_CONNECT_TIMEOUT,
+                read=PROXY_READ_TIMEOUT,
+            )
 
             with httpx.Client(timeout=timeout, follow_redirects=False) as client:
                 response = client.get(
@@ -244,7 +247,10 @@ async def pypi_package_versions(
 
             package_url = source.url.rstrip('/') + f'/simple/{normalized_name}/'
 
-            timeout = httpx.Timeout(PROXY_READ_TIMEOUT, connect=PROXY_CONNECT_TIMEOUT)
+            timeout = httpx.Timeout(
+                connect=PROXY_CONNECT_TIMEOUT,
+                read=PROXY_READ_TIMEOUT,
+            )
 
             with httpx.Client(timeout=timeout, follow_redirects=False) as client:
                 response = client.get(
@@ -379,7 +385,10 @@ async def pypi_download_file(
             headers.update(_build_auth_headers(matched_source))
         auth = _get_basic_auth(matched_source) if matched_source else None
 
-        timeout = httpx.Timeout(300.0, connect=PROXY_CONNECT_TIMEOUT)  # 5 minutes for large files
+        timeout = httpx.Timeout(
+            connect=PROXY_CONNECT_TIMEOUT,
+            read=300.0,  # 5 minutes for large files
+        )
 
         # Fetch the file
         logger.info(f"PyPI proxy: fetching {filename} from {upstream_url}")