Discworld complete, data quality cleanup, 100% summary coverage

Discworld complete - all 35 Discworld books now have chapter summaries and character tracking. Processed across all sub-series: City Watch (8 books), Death (5 books), Rincewind/Wizards (8 books), Witches (6 books including Monstrous Regiment and The Truth), Tiffany Aching (5 books), and Industrial Revolution (3 books). Over 2,200 appearances tracked across 228 characters. Recurring characters (Vimes, Granny Weatherwax, Rincewind, Death, Vetinari, Nanny Ogg, the Librarian) correctly linked across multiple books using existing character IDs.

100% summary coverage - every book in the database (252 books) now has chapter summaries. all 8,220 content segments have descriptions.

Character duplicate cleanup - merged 10 duplicate Discworld characters that were created under different names (Lord Vetinari/The Patrician/Havelock Vetinari, Granny Weatherwax/Esmerelda Weatherwax, Death duplicates, Librarian duplicates, Vimes variants, Sybil Ramkin variants, Albert variants). All appearances and entity links repointed to canonical characters. Added aliases for Vimes (Captain Vimes, Commander Vimes, His Grace His Excellency The Duke of Ankh).

Species and gender validation - fixed 69 characters with invalid species values (capitalised, spaces, non-standard names) and 18 characters with invalid gender values. All species now use valid lookup values. All gender values now lowercase (male, female, non_binary, unknown).

Character timestamp fix - 287 characters and 2,931 appearances created with string timestamps converted to Unix epoch integers to match existing data format.

Thin descriptions expanded - all 72 characters with descriptions under 50 characters now have proper 1-2 sentence descriptions based on their first appearance context.

Cross-universe contamination cleanup - found and removed 95 false character appearances from a bulk name-matching pass where short character names (e.g. "Min", "Thor", "Bard") had incorrectly matched across universes. One Bard duplicate merged (Bard + Bard the Bowman).

Discworld complete, data quality cleanup, 100% summary coverage

100% summary coverage - every book in the database (252 books) now has chapter summaries. all 8,220 content segments have descriptions.

Character timestamp fix - 287 characters and 2,931 appearances created with string timestamps converted to Unix epoch integers to match existing data format.

Thin descriptions expanded - all 72 characters with descriptions under 50 characters now have proper 1-2 sentence descriptions based on their first appearance context.