Adds tags.py module implementing a three-outcome heuristic:
- Individual-to-individual correspondence tags ("Clara an Herbert") → dropped
- Group/collective correspondence ("Clara an Kinder", "Walter an Geschwister") → Briefwechsel/<value>
- Semantic/event tags ("Brautbriefe", "Alltag", "zur Hochzeit") → Themen/<value>
Three correspondence patterns detected: space-an-space, starts-with-"an ",
and abbreviated-sender form ("Maria W.an Clara").
COLLECTIVE_TERMS in config.py extended with 17 plural/group relational terms
(söhne, brüder, schwiegereltern, cousinen, etc.) confirmed against the full Excel.
Also adds two-phase summary mining: every run emits review/tag-candidates.csv;
subsequent runs apply keywords from overrides/approved-themes.csv as Themen tags.
Outputs: canonical-documents.xlsx gets pipe-separated "Parent/Child" tag paths;
canonical-tag-tree.xlsx provides the full tag hierarchy for backend pre-import.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add Spanish month names (Mexican-branch letters) to config.MONTHS and let
the month-first matcher accept a hyphen (not just a dot) before the year, so
"Mayo 18-1929"/"Junio 7-904" parse without manual overrides. Also bound
4-digit years to 1700-2100 so gross typos ("23-9003") stay in review instead
of producing a bogus year. Cuts unknown-date rate 9.2% -> 7.9%.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
