feat: add internal ZCLAW kernel crates to git tracking

crates/zclaw-memory/src/schema.rs

@@ -0,0 +1,56 @@
+//! Database schema definitions
+
+/// Current schema version
+pub const SCHEMA_VERSION: i32 = 1;
+
+/// Schema creation SQL
+pub const CREATE_SCHEMA: &str = r#"
+-- Agents table
+CREATE TABLE IF NOT EXISTS agents (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    config TEXT NOT NULL,
+    created_at TEXT NOT NULL,
+    updated_at TEXT NOT NULL
+);
+
+-- Sessions table
+CREATE TABLE IF NOT EXISTS sessions (
+    id TEXT PRIMARY KEY,
+    agent_id TEXT NOT NULL,
+    created_at TEXT NOT NULL,
+    updated_at TEXT NOT NULL,
+    FOREIGN KEY (agent_id) REFERENCES agents(id) ON DELETE CASCADE
+);
+
+-- Messages table
+CREATE TABLE IF NOT EXISTS messages (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    session_id TEXT NOT NULL,
+    seq INTEGER NOT NULL,
+    content TEXT NOT NULL,
+    created_at TEXT NOT NULL,
+    FOREIGN KEY (session_id) REFERENCES sessions(id) ON DELETE CASCADE,
+    UNIQUE(session_id, seq)
+);
+
+-- KV Store table
+CREATE TABLE IF NOT EXISTS kv_store (
+    agent_id TEXT NOT NULL,
+    key TEXT NOT NULL,
+    value TEXT NOT NULL,
+    updated_at TEXT NOT NULL,
+    PRIMARY KEY (agent_id, key),
+    FOREIGN KEY (agent_id) REFERENCES agents(id) ON DELETE CASCADE
+);
+
+-- Schema version table
+CREATE TABLE IF NOT EXISTS schema_version (
+    version INTEGER PRIMARY KEY
+);
+
+-- Indexes
+CREATE INDEX IF NOT EXISTS idx_sessions_agent ON sessions(agent_id);
+CREATE INDEX IF NOT EXISTS idx_messages_session ON messages(session_id);
+CREATE INDEX IF NOT EXISTS idx_kv_agent ON kv_store(agent_id);
+"#;