v2.3.0 - Update Icon Fix + Phase 2.3 Foundation

• Fixed WordPress update UI icon placeholder by injecting plugin icons/banners into update payload and plugin info
• Added Phase 2.3 foundation tables: spf_fraud_settings, spf_fraud_events, spf_integrations, spf_integration_logs
• Implemented geolocation/fraud backend with settings, scoring, reporting, and review actions
• Implemented integrations backend with encrypted config storage, provider connection tests, trigger execution, and logs
• Wired fraud assessment and integration triggers into submission flow
• Extended uninstall cleanup for new Phase 2.3 tables