Re-enable commented-out integration test matrix entries in tests.yml

[adecaro]

Problem

Several matrix entries in the itest job of .github/workflows/tests.yml are commented out, so these integration test suites do not run in CI:

• dlog-fabric-t14
• fabricx-dlog-t2
• fabricx-dlog-t2.1
• fabricx-dlog-t7
• fabricx-dlog-t9
• fabricx-dlog-t14

These were disabled in commit ad0af49 ("cleanup") without an explanation in the codebase of why, which means the corresponding coverage is currently missing from CI without a documented reason or follow-up.

Impact

• Reduced CI coverage for the dlog-fabric and fabricx-dlog integration suites.
• No visibility into whether these tests are flaky, broken, redundant, or simply pending re-enablement.

Ask

Investigate why each of these matrix entries was disabled, fix any underlying issues (flakiness, broken setup, etc.), and re-enable them in the itest matrix — or, if any should remain disabled permanently, document why directly in the workflow file.