Added proper error handling for url.Parse calls in PublicURL and AbsoluteURL
functions. When parsing fails, PublicURL now falls back to AbsoluteURL, and
AbsoluteURL logs the error and returns an empty string, preventing malformed
URLs from being generated.
Replaced the non-atomic UPDATE-then-INSERT pattern in plugin repository Put
method with a single atomic INSERT ... ON CONFLICT statement. This eliminates
potential race conditions and improves consistency with the upsert pattern
already used in host_kvstore.go.