Jina metadata parser is blog-only — needs two profiles + fuzzy routing (academic sources lose their date/publisher)

Jina returns rich metadata for every source, but the parser only reads OpenGraph/blog keys (article:published_time, og:site_name). Scholarly articles carry their metadata under Highwire/Dublin-Core/PRISM keys (citation_*, dc.*, prism.*), so their date and publisher fall through empty and the operator hand-fills them. Fix: two parser profiles — structured and opengraph — with fuzzy routing by source kind, and a manual override so a human can re-route when detection is wrong.