Inverts the /api/geocode chain. Photon is now the primary search
engine; the hand-rolled Netsyms free-text parser is removed.
Address book short-circuits nicknames only ("home", "work") —
full-address queries flow through Photon and address book
entries within 75m annotate matching results with labeled_as.
Coordinate strings detected before search.
Response shape: /api/geocode now returns a ranked candidates
list (always 200 OK, empty list if no match). No more 404 for
unmatched queries. Users can type messy input — wrong case,
missing punctuation, abbreviations, typos — and get results
or close matches.
Netsyms preserved at /api/netsyms/lookup for direct access.
USPS plus4 enrichment of Photon street-address hits is a
planned follow-up.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
