feat(memory): 实现 SqliteStore 持久化
- 新增 src/memory/store/sqlite_store.rs(SqliteStore + 9 个内联测试)
- 基于 rusqlite 0.32(bundled),使用 Arc<Mutex<Connection>> + spawn_blocking
- WAL 模式 + synchronous=NORMAL + busy_timeout=5s + PRAGMA user_version
schema 版本管理
- created_at 归一化为 UTC 的 RFC 3339 TEXT,字典序等价时间序
- 错误精细映射:SqliteFailure/InvalidQuery → InvalidInput;
FromSqlConversionFailure → Serialization;其他 → Storage
- 9 个测试覆盖 CRUD、upsert、prefix/since/offset+limit 过滤、
10 写者 × 10 次并发、持久化 round-trip、trait-box 互换兼容性
依赖:
- rusqlite = { version = "0.32", features = ["bundled"] }
- time 增补 features: parsing, formatting, macros
- dev-dependencies: tempfile = "3"
测试:199 → 200 pass(191 原有 + 9 新增)
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@@ -6,8 +6,10 @@ use crate::memory::error::MemoryError;
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use crate::memory::types::{MemoryFilter, MemoryItem};
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pub mod in_memory;
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pub mod sqlite_store;
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pub use in_memory::InMemoryStore;
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pub use sqlite_store::SqliteStore;
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/// 底层记忆存储抽象接口。
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///
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