fix(rs3): probe /readyz and drop unused RS3_ENDPOINT

The rs3 server binary never reads RS3_ENDPOINT; it is a client-only setting
for rs3-cli, which only the old healthcheck used. Switch the rs3 healthcheck
to `curl --fail .../readyz` with a start period (matching scripts/run_rs3.sh
and CI) and remove the now-dead RS3_ENDPOINT from compose.yml, the demo-server
compose, run_rs3.sh, and the test workflow.

Verification:
- git grep RS3_ENDPOINT -> no matches
- docker compose config for compose.yml and tools/demo-server/compose.yml

.github/workflows/test.yml

@@ -45,7 +45,6 @@ jobs:
           RS3_DATA_DIR: /var/lib/rs3/data
           RS3_ACCESS_KEY: sigma
           RS3_SECRET_KEY: sigma-sigma
-          RS3_ENDPOINT: http://127.0.0.1:9000
         ports:
           - 9000:9000
         entrypoint: /bin/sh

compose.yml

@@ -68,7 +68,6 @@ services:
       RS3_DATA_DIR: /var/lib/rs3/data
       RS3_ACCESS_KEY: sigma
       RS3_SECRET_KEY: sigma-sigma
-      RS3_ENDPOINT: http://127.0.0.1:9000
     entrypoint:
       - /bin/sh
       - -c
@@ -76,10 +75,11 @@ services:
     volumes:
       - ${PWD}/storage/rs3:/var/lib/rs3/data
     healthcheck:
-      test: ["CMD-SHELL", "rs3-cli ls s3://sigma >/dev/null 2>&1"]
-      interval: 10s
-      timeout: 5s
-      retries: 10
+      test: ["CMD-SHELL", "curl --fail http://127.0.0.1:$$RS3_PORT/readyz || exit 1"]
+      interval: 30s
+      timeout: 3s
+      start_period: 5s
+      retries: 3
     networks:
       - default
 networks:

scripts/run_rs3.sh

@@ -9,7 +9,6 @@ DOCKER=${DOCKER:-docker}
   -e RS3_DATA_DIR=/var/lib/rs3/data \
   -e RS3_ACCESS_KEY=sigma \
   -e RS3_SECRET_KEY=sigma-sigma \
-  -e RS3_ENDPOINT=http://127.0.0.1:9000 \
   --rm -d \
   --entrypoint "" \
   --health-cmd 'curl --fail "http://127.0.0.1:${RS3_PORT}/readyz" || exit 1' \

tools/demo-server/compose.yml

@@ -133,7 +133,6 @@ services:
       RS3_DATA_DIR: /var/lib/rs3/data
       RS3_ACCESS_KEY: ${USERNAME}
       RS3_SECRET_KEY: ${PASSWORD}
-      RS3_ENDPOINT: http://127.0.0.1:9000
     entrypoint:
       - /bin/sh
       - -c
@@ -141,10 +140,11 @@ services:
     volumes:
       - ${VOLUME_PREFIX}/rs3:/var/lib/rs3/data
     healthcheck:
-      test: ["CMD-SHELL", "rs3-cli ls s3://sigma >/dev/null 2>&1"]
-      interval: 10s
-      timeout: 5s
-      retries: 10
+      test: ["CMD-SHELL", "curl --fail http://127.0.0.1:$$RS3_PORT/readyz || exit 1"]
+      interval: 30s
+      timeout: 3s
+      start_period: 5s
+      retries: 3
     networks:
       - default
     labels: