feat: extend memory search and attachment mapping

core/db.py

@@ -43,6 +43,62 @@ ON user_resources (session_id);
 CREATE INDEX IF NOT EXISTS idx_user_resources_user_id
 ON user_resources (user_id);
 
+CREATE TABLE IF NOT EXISTS memory_attachments (
+    id TEXT PRIMARY KEY,
+    user_id TEXT NOT NULL,
+    app_id TEXT NOT NULL DEFAULT 'default',
+    project_id TEXT NOT NULL DEFAULT 'default',
+    session_id TEXT NOT NULL,
+    resource_id TEXT,
+    content_type TEXT NOT NULL,
+    name TEXT NOT NULL,
+    internal_uri TEXT NOT NULL,
+    source TEXT NOT NULL,
+    sha256 TEXT,
+    created_at TIMESTAMP NOT NULL,
+    deleted_at TIMESTAMP
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_memory_attachments_unique_uri
+ON memory_attachments (user_id, session_id, internal_uri);
+
+CREATE INDEX IF NOT EXISTS idx_memory_attachments_user_session
+ON memory_attachments (user_id, session_id, deleted_at);
+
+CREATE INDEX IF NOT EXISTS idx_memory_attachments_resource
+ON memory_attachments (resource_id, deleted_at);
+
+INSERT OR IGNORE INTO memory_attachments (
+    id,
+    user_id,
+    app_id,
+    project_id,
+    session_id,
+    resource_id,
+    content_type,
+    name,
+    internal_uri,
+    source,
+    sha256,
+    created_at,
+    deleted_at
+)
+SELECT
+    'a_resource_' || id,
+    user_id,
+    app_id,
+    project_id,
+    session_id,
+    id,
+    content_type,
+    COALESCE(original_filename, id),
+    uri,
+    'resource_upload',
+    sha256,
+    created_at,
+    deleted_at
+FROM user_resources;
+
 CREATE TABLE IF NOT EXISTS memory_tombstones (
     id TEXT PRIMARY KEY,
     user_id TEXT NOT NULL,