docs(docs): update server start and quick-start docs to require PG/SQLite, Redis, and ClickHouse

- Restructure docs/deployment/server.md into Docker (Quick Start, Production Recommended, Advanced with Jaeger) and Local deployment.
- Update docs/guide/quick-start.md default docker-compose to use PostgreSQL, Redis, and ClickHouse as default.

.env.example

@@ -4,19 +4,6 @@
 # 环境变量优先级高于 config.yaml / config.docker.yaml
 # ──────────────────────────────────────────────────────────────────────────────
 
-# ─── Docker Compose 服务端口映射 ───────────────────────────────────────────────
-APP_PORT=3000
-POSTGRES_PORT=5432
-REDIS_PORT=6379
-JAEGER_UI_PORT=16686
-JAEGER_OTLP_GRPC_PORT=4317
-JAEGER_OTLP_HTTP_PORT=4318
-
-# ─── PostgreSQL 容器配置（仅 docker-compose 使用）────────────────────────────
-POSTGRES_DB=openflare
-POSTGRES_USER=postgres
-POSTGRES_PASSWORD=postgres
-
 # ─── 时区 ─────────────────────────────────────────────────────────────────────
 TZ=Asia/Shanghai
 
@@ -77,24 +64,10 @@ LOG_OUTPUT=stdout
 OTEL_EXPORTER_OTLP_ENDPOINT=http://jaeger:4317
 OTEL_EXPORTER_OTLP_INSECURE=true
 # 设为 0 关闭 tracing；本地 Jaeger 调试建议设为 1.0
-OTEL_SAMPLING_RATE=1.0
+OTEL_SAMPLING_RATE=0.0
 # 全局 Tracer 命名空间，默认为 github.com/Rain-kl/OpenFlare
 # OTEL_TRACER_NAME=github.com/Rain-kl/OpenFlare
 
-# ─── S3 兼容存储（可选，默认关闭）──────────────────────────────────────────
-# S3_ENABLED=false
-# S3_ENDPOINT=https://<account-id>.r2.cloudflarestorage.com
-# S3_REGION=auto
-# S3_BUCKET=<bucket-name>
-# S3_ACCESS_KEY_ID=<access-key>
-# S3_SECRET_ACCESS_KEY=<secret-key>
-# S3_PATH_STYLE=false
-# S3_CDN_URL=
-
 # ─── Worker ────────────────────────────────────────────────────────────────────
 # WORKER_CONCURRENCY=20
 # WORKER_STRICT_PRIORITY=false
-
-# ─── Scheduler ─────────────────────────────────────────────────────────────────
-# 未设置时默认为 @daily
-# SCHEDULER_CLEANUP_CRON=0 */2 * * *