chore(infra): J6 — mark 3 dormant docker-compose files as deprecated

Audit cross-checked against active composes shows three dormant compose
files that duplicate functionality already covered by the canonical
docker-compose.{,dev,prod,staging,test}.yml at the repo root. None are
referenced from Make targets, scripts, or CI workflows. They have
diverged from the active set (different ports, older Postgres version,
no shared volume names, etc.) and are a footgun for new contributors.

Files marked DEPRECATED with a header pointing at the canonical compose
to use instead:

  veza-stream-server/docker-compose.yml
    Standalone stream-server compose. Same service is provided by the
    root docker-compose.yml under the `docker-dev` profile.

  infra/docker-compose.lab.yml
    Lab Postgres on default port 5432. Conflicts with a host Postgres on
    most setups; root docker-compose.dev.yml uses non-default ports for
    a reason.

  config/docker/docker-compose.local.yml
    Local Postgres 15 variant on port 5433. Redundant with root
    docker-compose.dev.yml (Postgres 16, project-wide port mapping).

Not in this commit (intentionally limited J6 scope, per audit plan
"verify, don't refactor"):

  - No `extends:` consolidation across the active composes — that is a
    1-2 day refactor on its own and not a v1.0.4 concern.
  - The five active composes were syntactically validated locally
    (docker compose config); production and staging both require
    operator-injected env vars (DB_PASS, S3_*, RABBITMQ_PASS, etc.)
    which is the intended behavior, not a bug.
  - Cross-compose audit confirms zero references to the removed
    chat-server or any other dead service / image. Only one residual
    deprecation warning across all active composes: the obsolete
    `version:` field on docker-compose.{prod,test,test}.yml — cosmetic,
    not blocking.
  - Test suite verification (Go / Rust / Vitest) deferred to Forgejo CI
    rather than re-running locally. The pre-push hook + remote pipeline
    will gate the next push.

Follow-up candidates (not blocking v1.0.4):
  - Delete the three deprecated files once a 2-month grace period
    confirms no local dev workflow references them.
  - Drop the obsolete `version:` field across the active composes.

Refs: AUDIT_REPORT.md §6.1, §10 P7

config/docker/docker-compose.local.yml

@@ -1,4 +1,11 @@
-version: '3.8'
+# ============================================================================
+# DEPRECATED — local dev compose variant (postgres:15 on port 5433).
+# Redundant with docker-compose.dev.yml at the repo root (postgres:16 on the
+# project-wide port mapping). Use docker-compose.dev.yml instead:
+#   docker compose -f docker-compose.dev.yml up -d
+# Marked in v1.0.4 cleanup. Candidate for deletion once confirmed unused.
+# ============================================================================
+version: "3.8"
 
 services:
     # Base de données PostgreSQL
@@ -38,12 +45,12 @@ services:
             - ./config/prometheus.yml:/etc/prometheus/prometheus.yml
             - prometheus_data:/prometheus
         command:
-      - '--config.file=/etc/prometheus/prometheus.yml'
+            - "--config.file=/etc/prometheus/prometheus.yml"
-      - '--storage.tsdb.path=/prometheus'
+            - "--storage.tsdb.path=/prometheus"
-      - '--web.console.libraries=/etc/prometheus/console_libraries'
+            - "--web.console.libraries=/etc/prometheus/console_libraries"
-      - '--web.console.templates=/etc/prometheus/consoles'
+            - "--web.console.templates=/etc/prometheus/consoles"
-      - '--storage.tsdb.retention.time=200h'
+            - "--storage.tsdb.retention.time=200h"
-      - '--web.enable-lifecycle'
+            - "--web.enable-lifecycle"
         networks:
             - veza-network
 

infra/docker-compose.lab.yml

@@ -1,3 +1,11 @@
+# ============================================================================
+# DEPRECATED — lab environment compose, dormant since February 2026.
+# Overlaps with docker-compose.dev.yml at the repo root (which uses non-default
+# ports to avoid conflicts with a host Postgres). Use docker-compose.dev.yml
+# for day-to-day dev:
+#   docker compose -f docker-compose.dev.yml up -d
+# Marked in v1.0.4 cleanup. Candidate for deletion once confirmed unused.
+# ============================================================================
 version: "3.9"
 
 services:
@@ -66,7 +74,6 @@ services:
 volumes:
     postgres_lab_data:
 
-
 networks:
     veza-lab-net:
         driver: bridge

veza-stream-server/docker-compose.yml

@@ -1,4 +1,11 @@
-version: '3.8'
+# ============================================================================
+# DEPRECATED — standalone stream-server compose.
+# Use docker-compose.yml (root) with the `docker-dev` profile instead:
+#   docker compose --profile docker-dev up -d stream-server
+# Marked in v1.0.4 cleanup. Candidate for deletion once no local dev
+# reference is found (2+ month grace period).
+# ============================================================================
+version: "3.8"
 
 services:
     stream-server:
@@ -38,10 +45,10 @@ services:
             resources:
                 limits:
                     memory: 512M
-          cpus: '1.0'
+                    cpus: "1.0"
                 reservations:
                     memory: 128M
-          cpus: '0.25'
+                    cpus: "0.25"
 
         # Configuration de sécurité
         security_opt:
@@ -98,12 +105,12 @@ services:
             - ./monitoring/prometheus.yml:/etc/prometheus/prometheus.yml:ro
             - prometheus_data:/prometheus
         command:
-      - '--config.file=/etc/prometheus/prometheus.yml'
+            - "--config.file=/etc/prometheus/prometheus.yml"
-      - '--storage.tsdb.path=/prometheus'
+            - "--storage.tsdb.path=/prometheus"
-      - '--web.console.libraries=/etc/prometheus/console_libraries'
+            - "--web.console.libraries=/etc/prometheus/console_libraries"
-      - '--web.console.templates=/etc/prometheus/consoles'
+            - "--web.console.templates=/etc/prometheus/consoles"
-      - '--storage.tsdb.retention.time=200h'
+            - "--storage.tsdb.retention.time=200h"
-      - '--web.enable-lifecycle'
+            - "--web.enable-lifecycle"
         networks:
             - stream_network
         profiles: