实现七月迭代公共技术基础

migrations/000165_create_public_outbox.down.sql

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+-- 已产生可靠事件后禁止通过降级删除事实，只允许空表回滚。
+DO $$
+BEGIN
+    IF to_regclass('tb_outbox_event') IS NOT NULL
+       AND EXISTS (SELECT 1 FROM tb_outbox_event LIMIT 1) THEN
+        RAISE EXCEPTION 'tb_outbox_event 已存在事件事实，禁止删表回滚，请停止生产者和 Relay 后向前修复';
+    END IF;
+END
+$$;
+
+DROP TABLE IF EXISTS tb_outbox_event;

migrations/000165_create_public_outbox.up.sql

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+-- 创建公共 Outbox；该表及全部公共索引、约束只由 tech-public-foundation 维护。
+CREATE TABLE tb_outbox_event (
+    id bigserial PRIMARY KEY,
+    event_id varchar(64) NOT NULL,
+    event_type varchar(150) NOT NULL,
+    payload_version integer NOT NULL DEFAULT 1,
+    aggregate_type varchar(100) NOT NULL,
+    aggregate_id varchar(100) NOT NULL,
+    resource_type varchar(100) NOT NULL,
+    resource_id varchar(100) NOT NULL,
+    business_key varchar(150) NOT NULL DEFAULT '',
+    request_id varchar(100) NOT NULL DEFAULT '',
+    correlation_id varchar(100) NOT NULL DEFAULT '',
+    payload jsonb NOT NULL,
+    status integer NOT NULL DEFAULT 1,
+    retry_count integer NOT NULL DEFAULT 0,
+    max_retries integer NOT NULL DEFAULT 10,
+    next_attempt_at timestamptz NOT NULL DEFAULT NOW(),
+    lease_owner varchar(100),
+    lease_expires_at timestamptz,
+    last_error_code varchar(100) NOT NULL DEFAULT '',
+    last_error_summary varchar(500) NOT NULL DEFAULT '',
+    delivered_at timestamptz,
+    created_at timestamptz NOT NULL DEFAULT NOW(),
+    updated_at timestamptz NOT NULL DEFAULT NOW(),
+    CONSTRAINT uq_outbox_event_id UNIQUE (event_id),
+    CONSTRAINT ck_outbox_event_status CHECK (status IN (1, 2, 3, 4)),
+    CONSTRAINT ck_outbox_event_payload_version CHECK (payload_version > 0),
+    CONSTRAINT ck_outbox_event_retry_count CHECK (retry_count >= 0 AND max_retries > 0)
+);
+
+CREATE INDEX idx_outbox_event_claim
+    ON tb_outbox_event (status, next_attempt_at, lease_expires_at, created_at);
+CREATE INDEX idx_outbox_event_type_status
+    ON tb_outbox_event (event_type, status);
+CREATE INDEX idx_outbox_event_aggregate
+    ON tb_outbox_event (aggregate_type, aggregate_id, created_at);
+CREATE INDEX idx_outbox_event_resource
+    ON tb_outbox_event (resource_type, resource_id, created_at);
+CREATE INDEX idx_outbox_event_request_id ON tb_outbox_event (request_id) WHERE request_id <> '';
+CREATE INDEX idx_outbox_event_correlation_id ON tb_outbox_event (correlation_id) WHERE correlation_id <> '';
+
+COMMENT ON TABLE tb_outbox_event IS '公共可靠事件 Outbox';
+COMMENT ON COLUMN tb_outbox_event.status IS '投递状态 1=待投递, 2=投递中, 3=已投递, 4=投递失败';

migrations/000166_create_system_config.down.sql

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+-- 已产生配置事实后禁止通过降级删除，只允许空表回滚。
+DO $$
+BEGIN
+    IF to_regclass('tb_system_config') IS NOT NULL
+       AND EXISTS (SELECT 1 FROM tb_system_config LIMIT 1) THEN
+        RAISE EXCEPTION 'tb_system_config 已存在配置事实，禁止删表回滚，请停止写入后向前修复';
+    END IF;
+END
+$$;
+
+DROP TABLE IF EXISTS tb_system_config;

migrations/000166_create_system_config.up.sql

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+-- 创建受控系统配置表；具体业务 Key 由所属业务模块注册，不在公共迁移中预置。
+CREATE TABLE tb_system_config (
+    id bigserial PRIMARY KEY,
+    config_key varchar(150) NOT NULL,
+    config_value text NOT NULL,
+    value_type varchar(20) NOT NULL,
+    module varchar(100) NOT NULL,
+    description varchar(500) NOT NULL,
+    is_readonly boolean NOT NULL DEFAULT false,
+    is_sensitive boolean NOT NULL DEFAULT false,
+    creator bigint NOT NULL DEFAULT 0,
+    updater bigint NOT NULL DEFAULT 0,
+    created_at timestamptz NOT NULL DEFAULT NOW(),
+    updated_at timestamptz NOT NULL DEFAULT NOW(),
+    CONSTRAINT uq_system_config_key UNIQUE (config_key),
+    CONSTRAINT ck_system_config_value_type CHECK (value_type IN ('string', 'int', 'bool', 'json'))
+);
+
+CREATE INDEX idx_system_config_module_key ON tb_system_config (module, config_key);
+
+COMMENT ON TABLE tb_system_config IS '受控系统配置表';
+COMMENT ON COLUMN tb_system_config.value_type IS '值类型 string/int/bool/json';