refactor(core): move v1 schemas into core (#30473)

packages/opencode/test/server/session-diff-missing-patch.test.ts

@@ -15,7 +15,7 @@ import { Effect, Layer } from "effect"
 import { SessionPaths } from "@/server/routes/instance/httpapi/groups/session"
 import { Session } from "@/session/session"
 import { Storage } from "@/storage/storage"
-import { SessionLegacy } from "@opencode-ai/core/session/legacy"
+import { SessionV1 } from "@opencode-ai/core/v1/session"
 import { MessageID } from "@/session/schema"
 import { ProviderV2 } from "@opencode-ai/core/provider"
 import { resetDatabase } from "../fixture/db"
@@ -83,7 +83,7 @@ describe("session diff with missing patch (#26574)", () => {
           summary: {
             diffs: [{ file: "turn.ts", additions: 1, deletions: 0, status: "modified" }],
           },
-        } satisfies SessionLegacy.User)
+        } satisfies SessionV1.User)
 
         const response = yield* requestInDirectory(
           `${pathFor(SessionPaths.diff, { sessionID: session.id })}?messageID=${messageID}`,