Add signature verification and lossless event tag storage

config/config.exs

@@ -43,6 +43,7 @@ config :parrhesia,
     management_auth_required: true
   ],
   features: [
+    verify_event_signatures: true,
     nip_45_count: true,
     nip_50_search: true,
     nip_77_negentropy: true,

config/test.exs

@@ -14,7 +14,8 @@ config :parrhesia, Parrhesia.Web.Endpoint,
 
 config :parrhesia,
   enable_expiration_worker: false,
-  moderation_cache_enabled: false
+  moderation_cache_enabled: false,
+  features: [verify_event_signatures: false]
 
 pg_host = System.get_env("PGHOST")