feat(endpoint): add tests and mark tasks 1-7 as completed

- Add 7 registry tests (handler_registry_*) to registry.rs
- Add 4 dispatch tests (build_auth_context_*, dispatch_decision_logic_*) to dispatch.rs
- Add 6 endpoint tests to endpoint.rs:
  - debug_for_alknet_endpoint_is_implemented_without_panicking
  - endpoint_constructs_with_iroh_raw_key_identity (adapted for new API)
  - iroh_endpoint_runs_accept_loop_and_shutdown (adapted for new API)
  - with_iroh_sets_field (replaces has_iroh_identity_true_for_raw_key)
  - without_iroh_field_is_none (replaces has_iroh_identity_false_for_x509)
  - endpoint_works_without_iroh (replaces has_iroh_identity_false_when_no_identity)
- Add async-trait as dev-dependency
- All 17 tests pass with iroh feature
- All 8 tests pass without features
- Workspace tests all pass (no breakage)
- Mark tasks 1-7 as completed

tasks/endpoint/accept-iroh.md

@@ -1,7 +1,7 @@
 ---
 id: endpoint/accept-iroh
 name: Implement iroh accept loop and extractors in alknet-endpoint
-status: pending
+status: completed
 depends_on: [endpoint/dispatch]
 scope: narrow
 risk: low

tasks/endpoint/accept-quinn.md

@@ -1,7 +1,7 @@
 ---
 id: endpoint/accept-quinn
 name: Implement quinn accept loop and extractors in alknet-endpoint
-status: pending
+status: completed
 depends_on: [endpoint/dispatch]
 scope: narrow
 risk: low

tasks/endpoint/accept-tcp-tls.md

@@ -1,7 +1,7 @@
 ---
 id: endpoint/accept-tcp-tls
 name: Implement TCP+TLS accept loop and extractors in alknet-endpoint (new code)
-status: pending
+status: completed
 depends_on: [endpoint/dispatch]
 scope: narrow
 risk: medium

tasks/endpoint/crate-init.md

@@ -1,7 +1,7 @@
 ---
 id: endpoint/crate-init
 name: Initialize alknet-endpoint crate with Cargo.toml, dependencies, and module skeleton
-status: pending
+status: completed
 depends_on: [tls/review-tls]
 scope: moderate
 risk: low

tasks/endpoint/dispatch.md

@@ -1,7 +1,7 @@
 ---
 id: endpoint/dispatch
 name: Implement public dispatch, build_auth_context, and ACME guard
-status: pending
+status: completed
 depends_on: [endpoint/endpoint-core]
 scope: narrow
 risk: low

tasks/endpoint/endpoint-core.md

@@ -1,7 +1,7 @@
 ---
 id: endpoint/endpoint-core
 name: Implement AlknetEndpoint struct, new, builder methods, run, and shutdown
-status: pending
+status: completed
 depends_on: [endpoint/registry]
 scope: moderate
 risk: medium

tasks/endpoint/registry.md

@@ -1,7 +1,7 @@
 ---
 id: endpoint/registry
 name: Extract HandlerRegistry from alknet-core/endpoint.rs into alknet-endpoint
-status: pending
+status: completed
 depends_on: [endpoint/crate-init]
 scope: narrow
 risk: low