fix(infra): cap Objecten/Objecttypen uWSGI to 1 worker — unstarve verify-stack e2e (closes #144)

The Maykin images run uWSGI with 4 processes × 4 threads by default. Two
web services × 4 idle Django workers (~200 MB each) sat idle during the
Playwright e2e step and starved the single shared CI runner, so Keycloak
and the portals stopped responding (login never loaded) and Chromium
crashed — main verify-stack went red from run 2177 (post-#142) onward
while the PR runs passed on a less loaded runner.

These APIs only serve single-request smoke checks and are idle during
e2e, so 1 worker is plenty. Verified locally: both services healthy with
UWSGI_PROCESSES=1 and make verify-objecten / verify-objecttypen still green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

infra/docker-compose.local.yml

@@ -583,6 +583,9 @@ services:
   objecttypen-init:
     image: docker.io/maykinmedia/objecttypes-api:${OBJECTTYPES_TAG:-3.4.2}
     environment: &objecttypen-env-local
+      # 1 uWSGI worker, not the image default of 4×4 (#144) — idle workers starve the CI runner.
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objecttypes.conf.docker
       SECRET_KEY: ${OBJECTTYPES_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecttypen-db
@@ -644,6 +647,9 @@ services:
   objecten-init:
     image: docker.io/maykinmedia/objects-api:${OBJECTS_TAG:-3.4.0}
     environment: &objecten-env-local
+      # 1 uWSGI worker, not the image default of 4×4 (#144) — idle workers starve the CI runner.
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objects.conf.docker
       SECRET_KEY: ${OBJECTS_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecten-db

infra/docker-compose.yml

@@ -596,6 +596,11 @@ services:
   objecttypen-init:
     image: docker.io/maykinmedia/objecttypes-api:${OBJECTTYPES_TAG:-3.4.2}
     environment: &objecttypen-env
+      # 1 uWSGI worker, not the image default of 4×4: this API only serves single-request smoke
+      # checks and sits idle during the e2e step — 4 idle Django workers each pin ~200 MB and starve
+      # the shared CI runner (#144). Init ignores this (it runs setup_configuration, not uwsgi).
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objecttypes.conf.docker
       SECRET_KEY: ${OBJECTTYPES_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecttypen-db
@@ -662,6 +667,9 @@ services:
   objecten-init:
     image: docker.io/maykinmedia/objects-api:${OBJECTS_TAG:-3.4.0}
     environment: &objecten-env
+      # 1 uWSGI worker, not the image default of 4×4 — see the objecttypen note above (#144).
+      UWSGI_PROCESSES: "1"
+      UWSGI_THREADS: "2"
       DJANGO_SETTINGS_MODULE: objects.conf.docker
       SECRET_KEY: ${OBJECTS_SECRET_KEY:-dev-only-not-for-production}
       DB_HOST: objecten-db