chore(sqlite): use wal journal mode and enable fk checks by default

internal/config/database.go

@@ -15,6 +15,6 @@ type DatabaseConfig struct {
 func NewDefaultDatabaseConfig() DatabaseConfig {
 	return DatabaseConfig{
 		Driver: "sqlite",
-		DSN:    "sqlite://emissary.sqlite",
+		DSN:    "sqlite://emissary.sqlite?_fk=true&_journal=WAL",
 	}
 }

misc/packaging/common/config-server.yml

@@ -9,7 +9,7 @@ server:
     port: 3000
   database:
     driver: sqlite
-    dsn: sqlite:///var/lib/emissary/data.sqlite
+    dsn: sqlite:///var/lib/emissary/data.sqlite?_fk=true&_journal=WAL
   cors:
     allowedOrigins: []
     allowCredentials: true