test: update Core 2.0 basic conformance report fixture to 11 cases

[DigiEmu]

Summary

This PR updates the Core 2.0 basic expected conformance report fixture to reflect the current official 11-case conformance pack.

It also adds a small semantic regression assertion so the fixture totals and case list do not drift from the expected Core 2.0 conformance state again.

Updated

• testdata/core_2_conformance/report_expected_basic.json
• internal/schema/conformance_report_schema_test.go

Behavior

• Updates report_expected_basic.json from:

  • total=10
  • passed=10

  to:

  • total=11
  • passed=11

• Adds the missing official case:

unsupported_canonicalization_profile_error
→ ERROR / UNSUPPORTED_CANONICALIZATION_PROFILE

• Keeps public JSON report shape unchanged.
• Keeps report_version as core-2-conformance-report-v1.

Validation

• go test ./... passes
• Experimental conformance CLI reports:

Conformance run summary: total=11 passed=11 failed=0

• Experimental conformance CLI --json reports:

{
  "status": "PASS",
  "total": 11,
  "passed": 11,
  "failed": 0,
  "report_version": "core-2-conformance-report-v1"
}

Compatibility

• No production code changed
• No public JSON report shape changed
• No schemas changed
• No CLI behavior changed
• No tags changed
• No v1.0 behavior changed