feat(httpserver): promote to v1.0.2 — configurable ShutdownTimeout, bump deps to v1.0.1, go 1.26

Add Config.ShutdownTimeout (SERVER_SHUTDOWN_TIMEOUT, default 10s) so callers can
configure the graceful-shutdown deadline without code changes. Previously hardcoded
to 10 seconds. Bump launcher and logz from v0.9.0 to v1.0.1, update go directive
from 1.25 to 1.26. API committed as stable.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

go.sum

@@ -1,6 +1,6 @@
-code.nochebuena.dev/go/launcher v0.9.0 h1:dJHonA9Xm03AQKK0919FJaQn9ZKHZ+RZfB9yxjnx3TA=
-code.nochebuena.dev/go/launcher v0.9.0/go.mod h1:IBtntmbnyddukjEhxlc7Ysdzz9nZsnd9+8FzAIHt77g=
-code.nochebuena.dev/go/logz v0.9.0 h1:wfV7vtI4V/8ED7Hm31Fbql7Y5iOGrlHN4X8Z5ajTZZE=
-code.nochebuena.dev/go/logz v0.9.0/go.mod h1:qODhSbKb+tWE7rdhHLcKweiP5CgwIaWoZxadCT3bQV8=
+code.nochebuena.dev/go/launcher v1.0.1 h1:hbPV8jNtyxfchrT7igzz3M2tKGI3bm8uWkHBXRvSPgg=
+code.nochebuena.dev/go/launcher v1.0.1/go.mod h1:1KwndVuqm31JN9Dpl9YvOmlogPlKKzoDMo9aRFkYwmM=
+code.nochebuena.dev/go/logz v1.0.1 h1:kK9aZo19L208CwCr2D/dbSOMaOv62cXsigMSsdFu+8Y=
+code.nochebuena.dev/go/logz v1.0.1/go.mod h1:YNpNm03fURm2v0ySh/477z9AJhtfRcd9rFOW6fFqgNM=
 github.com/go-chi/chi/v5 v5.2.1 h1:KOIHODQj58PmL80G2Eak4WdvUzjSJSm0vG72crDCqb8=
 github.com/go-chi/chi/v5 v5.2.1/go.mod h1:L2yAIGWB3H+phAw1NxKwWM+7eUH/lU8pOMm5hHcoops=