feat(core): store relative path for sessions (#24704)

packages/opencode/test/session/schema-decoding.test.ts

@@ -59,6 +59,7 @@ describe("Session.Info", () => {
       projectID,
       workspaceID,
       directory: "/tmp/proj",
+      path: "packages/opencode",
       parentID: sessionIDChild,
       summary: {
         additions: 10,

packages/opencode/test/session/session.test.ts

@@ -54,6 +54,7 @@ describe("session.created event", () => {
         expect(receivedInfo?.id).toBe(info.id)
         expect(receivedInfo?.projectID).toBe(info.projectID)
         expect(receivedInfo?.directory).toBe(info.directory)
+        expect(receivedInfo?.path).toBe(info.path)
         expect(receivedInfo?.title).toBe(info.title)
 
         await remove(info.id)