test: move http-axum tests to tests/

Drop bootstrap dev-dep. Extractor + api handler + app-context tests (need full AppState via build_deps) -> bootstrap/tests/http_handlers/. forms tests -> http-axum/tests/log_review_form_test.rs.
Federation collection tests now go through public federation::html_routes().
Kept inline (private fns): api/social social_actor_to_dto (4), federation/blocklist_api social_actor_to_blocked_dto (1), html/social social_actor_to_template (1), router slow_down/api_governor (2).

crates/adapters/http-axum/Cargo.toml

@@ -43,4 +43,3 @@ bytes = { workspace = true }
 futures = { workspace = true }
 tower = { version = "0.5", features = ["util"] }
 domain = { workspace = true, features = ["test-helpers"] }
-bootstrap = { workspace = true }