fix(restore): auto-approve restore jobs and retry AGE MVCC conflicts

Merge pull request #358 from aaronsb/feature/concept-evidence-required

fix(graph): address code review findings on evidence feature

feat(graph): require evidence on manual concept creation, add evidence endpoint

feat(ai): configurable max_tokens for extraction via init and database

fix(ai): increase OpenRouter max_tokens to 16384

fix(operator): fix argparse mapping for models enable/disable/default

feat(operator): add price sort toggle to model selection menu

refactor(schema): consolidate migrations 059-062 into single 059

fix(schema): widen pricing columns to unconstrained NUMERIC

fix(schema): add openrouter to provider check constraint, unmask key input

fix(operator): two-phase migrations — cold SQL then warm AGE/graph

fix(schema): make migration 058 and runner resilient to AGE cold start

fix(schema): add migration registration to 059 and 060

fix(operator): add requests to operator container deps