perf(storage): 极简化任务历史并增加保留治理

停止持久化 provider 原始响应、兼容响应快照、attempt/event/outbox 重复 JSON，并由标准任务结果动态生成 Kling/Keling/Volces 兼容响应。

增加事件去重与预算、极简 callback 投递、7/30 天分批清理、安全删除条件、并发迁移索引及可实际恢复的任务域排除备份。历史清理默认关闭，待兼容协议和异步恢复在线验证后单独启用。

验证：Go 全量测试与 go vet、PostgreSQL 18 集成与实际备份恢复、迁移安全测试、bash -n、ShellCheck、Compose 配置和人工发布脚本测试均通过。

apps/api/migrations/0083_task_history_minimal_storage.sql

@@ -0,0 +1,11 @@
+ALTER TABLE gateway_task_events
+  ADD COLUMN IF NOT EXISTS platform_id uuid;
+
+ALTER TABLE gateway_task_attempts
+  ADD COLUMN IF NOT EXISTS status_code integer;
+
+ALTER TABLE gateway_task_callback_outbox
+  ADD COLUMN IF NOT EXISTS locked_by text,
+  ADD COLUMN IF NOT EXISTS lock_token uuid,
+  ADD COLUMN IF NOT EXISTS locked_at timestamptz,
+  ADD COLUMN IF NOT EXISTS failed_at timestamptz;

apps/api/migrations/0084_task_history_retention_index.sql

@@ -0,0 +1,68 @@
+-- easyai:migration:no-transaction
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_tasks_retention
+  ON gateway_tasks(finished_at, id)
+  WHERE status IN ('succeeded', 'failed', 'cancelled');
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_attempts_retention
+  ON gateway_task_attempts((COALESCE(finished_at, started_at)), id)
+  WHERE status <> 'running';
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_events_retention
+  ON gateway_task_events(created_at, id);
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_param_logs_retention
+  ON gateway_task_param_preprocessing_logs(created_at, id);
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_tasks_minimal_compaction
+  ON gateway_tasks(updated_at, id)
+  WHERE COALESCE(normalized_request, '{}'::jsonb) <> '{}'::jsonb
+     OR compatibility_public_id IS NOT NULL
+     OR compatibility_submit_http_status IS NOT NULL
+     OR COALESCE(compatibility_submit_headers, '{}'::jsonb) <> '{}'::jsonb
+     OR COALESCE(compatibility_submit_body, '{}'::jsonb) <> '{}'::jsonb
+     OR result ?| ARRAY[
+       'raw', 'raw_data', 'rawData', 'provider_response', 'providerResponse',
+       'submit', 'file_retrieve', 'fileRetrieve', 'upstream_task_id', 'remote_task_id'
+     ]
+     OR error IS NOT NULL
+     OR octet_length(COALESCE(error_message, '')) > 2048;
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_tasks_checkpoint_compaction
+  ON gateway_tasks(updated_at, id)
+  WHERE COALESCE(remote_task_payload, '{}'::jsonb) <> '{}'::jsonb;
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_attempts_minimal_compaction
+  ON gateway_task_attempts(started_at, id)
+  WHERE request_snapshot <> '{}'::jsonb
+     OR COALESCE(response_snapshot, '{}'::jsonb) <> '{}'::jsonb
+     OR COALESCE(usage, '{}'::jsonb) <> '{}'::jsonb
+     OR COALESCE(metrics, '{}'::jsonb) <> '{}'::jsonb
+     OR COALESCE(pricing_snapshot, '{}'::jsonb) <> '{}'::jsonb
+     OR request_fingerprint IS NOT NULL;
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_events_minimal_compaction
+  ON gateway_task_events(created_at, id)
+  WHERE payload <> '{}'::jsonb
+     OR phase IS NOT NULL
+     OR COALESCE(progress, 0) <> 0
+     OR message IS NOT NULL;
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_param_logs_minimal_compaction
+  ON gateway_task_param_preprocessing_logs(created_at, id)
+  WHERE actual_input <> '{}'::jsonb
+     OR converted_output <> '{}'::jsonb
+     OR model_snapshot <> '{}'::jsonb
+     OR octet_length(changes::text) > 1024;
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_cloned_voices_minimal_compaction
+  ON gateway_cloned_voices(updated_at, id)
+  WHERE metadata ?| ARRAY['raw', 'raw_data', 'rawData', 'provider_response', 'providerResponse', 'request'];

apps/api/migrations/0085_task_event_platform_index.sql

@@ -0,0 +1,4 @@
+-- easyai:migration:no-transaction
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_events_platform_created
+  ON gateway_task_events(platform_id, created_at DESC)
+  WHERE platform_id IS NOT NULL;

apps/api/migrations/0086_task_callback_lock_index.sql

@@ -0,0 +1,24 @@
+-- easyai:migration:no-transaction
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_callback_outbox_stale
+  ON gateway_task_callback_outbox(status, locked_at)
+  WHERE status = 'processing';
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_callback_outbox_delivered_retention
+  ON gateway_task_callback_outbox(delivered_at, id)
+  WHERE status = 'delivered';
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_callback_outbox_failed_retention
+  ON gateway_task_callback_outbox(failed_at, id)
+  WHERE status = 'failed';
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_callback_outbox_payload_compaction
+  ON gateway_task_callback_outbox(created_at, id)
+  WHERE payload <> '{}'::jsonb;
+
+-- easyai:migration:statement
+CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_gateway_task_callback_outbox_legacy
+  ON gateway_task_callback_outbox(created_at, id)
+  WHERE status IN ('pending', 'processing');