feat: add iteration one attendance workflows

docs/tests/unit/attendance-current-state.md

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+# Test Evidence: Current business-date attendance state
+
+- **Test type:** Unit
+- **Requirement IDs:** `ATT-005`, `I1-UI-03`
+- **Scenario IDs:** `I1-ATT-03`, `I1-ATT-04`
+- **Test class/method:** `com.lab.labtimesheet.feature.attendance.service.AttendanceApplicationServiceTest`
+- **Implementation commit:** `pending (committed with this evidence)`
+
+## Protected behavior
+
+The public attendance service reports an eligible Intern's current business-date
+state as not checked in, checked in, or checked out without exposing attendance
+repositories/entities to dashboard consumers. Ineligible Interns are rejected.
+
+## Test method
+
+A fixed Clock, seeded policy, and mocked Spring Data/account boundaries drive the
+real application service through all three persisted-record shapes. A separate
+case makes account eligibility false and asserts the attendance rejection.
+
+## Hand-derived expected result
+
+No record means `NOT_CHECKED_IN`; a record without checkout means `CHECKED_IN`;
+a record with checkout means `CHECKED_OUT`. An ineligible user produces
+`INACTIVE_INTERN` instead of a state.
+
+## RED
+
+**Command**
+
+```text
+export JAVA_HOME=/opt/homebrew/opt/openjdk@25
+export PATH="$JAVA_HOME/bin:$PATH"
+./mvnw -Dtest=AttendancePersistenceIntegrationTest test
+```
+
+**Observed result**
+
+```text
+cannot find symbol: class AttendanceCurrentState
+Tests did not run because the requested public DTO/service behavior did not exist.
+BUILD FAILURE
+Process exited 1.
+```
+
+## GREEN
+
+**Command**
+
+```text
+export JAVA_HOME=/opt/homebrew/opt/openjdk@25
+export PATH="$JAVA_HOME/bin:$PATH"
+./mvnw -Dtest=AttendanceApplicationServiceTest test
+```
+
+**Observed result**
+
+```text
+Tests run: 2, Failures: 0, Errors: 0, Skipped: 0
+BUILD SUCCESS
+Process exited 0.
+```
+
+## Affected suite
+
+**Command and result**
+
+```text
+export JAVA_HOME=/opt/homebrew/opt/openjdk@25
+export PATH="$JAVA_HOME/bin:$PATH"
+export DOCKER_HOST=unix:///Users/sechmachine/.orbstack/run/docker.sock
+./mvnw -Dtest='*Attendance*Test' test
+Tests run: 26, Failures: 0, Errors: 0, Skipped: 0
+BUILD SUCCESS
+Process exited 0.
+```
+
+## External-test boundaries
+
+The unit test does not prove PostgreSQL persistence, account fixture creation,
+Spring transaction behavior, MVC rendering, or dashboard composition.