chore(legacy): relocate v1 dataconnect source

docs/05-project-onboarding-master.md

@@ -926,7 +926,7 @@ Via modular `profile_sections/` architecture:
 | Legacy Client Mobile | `_legacy/apps/krow_client_context.md` | Flutter (context doc) |
 | Legacy Worker (Legacy Staff) Mobile | `_legacy/apps/krow_staff_context.md` | Flutter (context doc) |
 | Legacy Backend | `_legacy/apps/php_backend_context.md` | PHP/Laravel |
-| New Backend | `backend/dataconnect/` | Firebase Data Connect |
+| Legacy V1 Data Connect Backend | `legacy/dataconnect-v1/` | Firebase Data Connect |
 
 ---
 
@@ -974,7 +974,7 @@ For each feature in Sprint 3:
 
 2. **Write Schema Incrementally**
    ```gql
-   # backend/dataconnect/schema/event.gql
+   # legacy/dataconnect-v1/schema/event.gql
    type Event @table {
      id: UUID! @default(expr: "uuidV4()")
      name: String!
@@ -989,7 +989,7 @@ For each feature in Sprint 3:
 
 3. **Define Queries/Mutations**
    ```gql
-   # backend/dataconnect/queries/events.gql
+   # legacy/dataconnect-v1/queries/events.gql
    query ListEvents($status: EventStatus) @auth(level: USER) {
      events(where: { status: { eq: $status } }) {
        id, name, status, date
@@ -1308,7 +1308,7 @@ Business (1) ──┬── (1) BusinessSetting
 | Legacy Client context | `_legacy/apps/krow_client_context.md` |
 | Legacy Staff context | `_legacy/apps/krow_staff_context.md` |
 | Architecture diagrams | `internal/launchpad/assets/diagrams/` |
-| Data Connect schemas | `backend/dataconnect/` |
+| Data Connect schemas | `legacy/dataconnect-v1/` |
 
 ---