correct platform verification evidence

docs/tests/integration/internship-start-guard.md

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+# Test Evidence: Internship cannot activate before its business start date
+
+- **Test type:** Integration
+- **Requirement IDs:** `ACC-019`, `ACC-020`
+- **Scenario IDs:** `AC-ACC-010` (start-date transition only)
+- **Test class/method:** `com.lab.labtimesheet.feature.account.service.AccountActivationIntegrationTest#internshipCannotActivateBeforeItsBusinessStartDate`
+- **Implementation commit:** `6181984cf85f184be39513d6313f9cbe8267add5`
+
+## Protected behavior
+
+An active Intern account cannot move its separately stored internship from `NOT_STARTED` to `ACTIVE` before the
+configured inclusive start date in the application's injected business timezone.
+
+## Test method
+
+The PostgreSQL 18.4 test creates and activates an Intern account through the production SMTP/account services. Its
+internship starts one business day after the fixed test clock. The Admin attempts the lifecycle transition and the
+test reloads the profile through the owning feature repository.
+
+## Hand-derived expected result
+
+The service throws an actionable start-date error and the persisted internship remains `NOT_STARTED`.
+
+## RED
+
+**Command**
+
+```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=AccountActivationIntegrationTest#internshipCannotActivateBeforeItsBusinessStartDate test
+```
+
+**Observed result**
+
+```text
+Tests run: 1, Failures: 1, Errors: 0, Skipped: 0
+Expected code to raise a throwable, but the internship activated before its start date.
+BUILD FAILURE
+```
+
+## GREEN
+
+**Command**
+
+```text
+./mvnw -Dtest=AccountActivationIntegrationTest#internshipCannotActivateBeforeItsBusinessStartDate test
+```
+
+**Observed result**
+
+```text
+Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
+BUILD SUCCESS
+PostgreSQL: 18.4
+```
+
+## Affected suite
+
+**Command and result**
+
+```text
+./mvnw -Dtest=BootstrapIntegrationTest,SmtpOnboardingWebIntegrationTest,AccountActivationIntegrationTest,AccountWebIntegrationTest,BootstrapOnboardingWebIntegrationTest,JavaMailSmtpProbeTest,SecurityResponseIntegrationTest test
+Tests run: 20, Failures: 0, Errors: 0, Skipped: 0
+BUILD SUCCESS
+```
+
+## External-test boundaries
+
+This covers only the early-activation guard. It does not claim the later scheduler, completion, withdrawal, transfer,
+or session-lifecycle portions of AC-ACC-010.