refactor(core): move database schema ownership (#29068)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

packages/core/src/session/schema.ts

@@ -0,0 +1,59 @@
+export * as SessionSchema from "./schema"
+
+import { Schema } from "effect"
+import { Location } from "../location"
+import { ModelV2 } from "../model"
+import { ProjectV2 } from "../project"
+import { RelativePath, optionalOmitUndefined, withStatics } from "../schema"
+import { WorkspaceV2 } from "../workspace"
+import { Identifier } from "../util/identifier"
+import { V2Schema } from "../v2-schema"
+
+export const Delivery = Schema.Literals(["immediate", "deferred"]).annotate({
+  identifier: "Session.Delivery",
+})
+export type Delivery = Schema.Schema.Type<typeof Delivery>
+
+export const DefaultDelivery = "immediate" satisfies Delivery
+
+export const ID = Schema.String.check(Schema.isStartsWith("ses")).pipe(
+  Schema.brand("SessionID"),
+  withStatics((schema) => ({
+    descending: (id?: string) => schema.make(id ?? "ses_" + Identifier.descending()),
+  })),
+)
+export type ID = typeof ID.Type
+
+export const LegacyInfo = Schema.Struct({
+  id: ID,
+  location: Location.Ref,
+  subpath: RelativePath, // derived from location
+  project: ProjectV2.ID, // derived from location
+})
+export type LegacyInfo = typeof LegacyInfo.Type
+
+export class Info extends Schema.Class<Info>("Session.Info")({
+  id: ID,
+  parentID: optionalOmitUndefined(ID),
+  projectID: ProjectV2.ID,
+  workspaceID: optionalOmitUndefined(WorkspaceV2.ID),
+  path: optionalOmitUndefined(Schema.String),
+  agent: optionalOmitUndefined(Schema.String),
+  model: ModelV2.Ref.pipe(optionalOmitUndefined),
+  cost: Schema.Finite,
+  tokens: Schema.Struct({
+    input: Schema.Finite,
+    output: Schema.Finite,
+    reasoning: Schema.Finite,
+    cache: Schema.Struct({
+      read: Schema.Finite,
+      write: Schema.Finite,
+    }),
+  }),
+  time: Schema.Struct({
+    created: V2Schema.DateTimeUtcFromMillis,
+    updated: V2Schema.DateTimeUtcFromMillis,
+    archived: optionalOmitUndefined(V2Schema.DateTimeUtcFromMillis),
+  }),
+  title: Schema.String,
+}) {}