governance: align integrations/verisim.a2ml naming with siblings' verisimdb.a2ml

[hyperpolymath]

januskey, maa-framework, nextgen-typing use verisimdb.a2ml; this repo uses verisim.a2ml. Rename for estate consistency (not done unilaterally in PR #72).

https://claude.ai/code/session_01GJatEm2TVFSTBEkKXmserJ