Refactor owner scope across channels and fix default routing fallback (#1151)

* refactor: add explicit owner scope across channels

* fix: tighten routine owner target routing

* fix: address owner scope review feedback

* Fix owner-scope onboarding and event trigger isolation

* Tighten routing fallback and wizard owner validation

* fix: address owner-scope follow-up review

* fix: tighten owner-scope follow-up details

* fix: import Channel trait in telegram test

* fix: normalize http webhook sender ids

* fix: address remaining owner-scope review issues

* fix: reconcile config rebase fallout

* fix: reconcile extension manager rebase drift

* fix: address current copilot review regressions

* fix: restore clippy matrix after rebase

tests/support/gateway_workflow_harness.rs

@@ -239,6 +239,7 @@ impl GatewayWorkflowHarness {
         let mut agent = Agent::new(
             components.config.agent.clone(),
             AgentDeps {
+                owner_id: components.config.owner_id.clone(),
                 store: components.db,
                 llm: components.llm,
                 cheap_llm: components.cheap_llm,