chore(tests): keep maintained coverage independent of TCP

[yordis]

• Preserves maintained core coverage on the supported client path.

[cursor]

PR Summary

Low Risk
Changes are limited to test projects and fixtures; production behavior is touched only indirectly via updated legacy authorization test expectations for removed TCP statistics access.

Overview
Migrates core test coverage off the legacy TCP/EventStore.ClientAPI path onto HTTPS/gRPC (EventStore.Client.Streams) and shared HTTP helpers, so maintained tests no longer depend on TCP readiness or TestConnection.

Adds TestCertificates (runtime-generated CA/server certs) and replaces ssl_connections usage in updated fixtures. Test setup drops WaitForTcpEndPoint / TCP client reconnect loops in favor of node start (and gRPC health where needed). MiniNode restarts in truncation tests now key only on HTTP port.

Removes or rewrites TCP-centric cases: follower auth via TCP, ignored persistent-subscription deadlock test, legacy policy expectation for Operations.Node.Statistics.Tcp, and cluster/options assertions for internal/external TCP advertise endpoints and TCP plugin config in startup_should.

Test API cleanups: ExpectedVersion and utils references point at EventStore.Core.Data / EventStore.Common.Utils; AllReader/filter tests use EventFilter.* factories instead of client Filter messages; enumerator/scavenge/transform suites use a shared gRPC Append/Read harness; a few gRPC metadata payloads use raw JSON instead of StreamMetadata client helpers.

^{Reviewed by Cursor Bugbot for commit a9a13e7. Bugbot is set up for automated code reviews on this repo. Configure here.}

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📥 Commits

Reviewing files that changed from the base of the PR and between 01d8da6 and a9a13e7.

📒 Files selected for processing (32)

• src/EventStore.Core.Tests/Authorization/LegacyPolicyVerification.cs
• src/EventStore.Core.Tests/ClientOperations/specification_with_bare_vnode.cs
• src/EventStore.Core.Tests/ClientOperations/when_committing_a_transaction_with_data.cs
• src/EventStore.Core.Tests/Helpers/TestCertificates.cs
• src/EventStore.Core.Tests/Helpers/TestFixtureWithExistingEvents.cs
• src/EventStore.Core.Tests/Http/HealthChecks/when_performing_a_live_check.cs
• src/EventStore.Core.Tests/Integration/authenticated_requests_made_from_a_follower.cs
• src/EventStore.Core.Tests/Integration/specification_with_a_single_node.cs
• src/EventStore.Core.Tests/Integration/when_a_single_node_is_restarted_multiple_times.cs
• src/EventStore.Core.Tests/Services/PersistentSubscription/PersistentSubscriptionTests.cs
• src/EventStore.Core.Tests/Services/Replication/LeaderReplication/when_replica_subscribes.cs
• src/EventStore.Core.Tests/Services/RequestManagement/Service/RequestManagerServiceSpecification.cs
• src/EventStore.Core.Tests/Services/Storage/AllReader/when_reading_all_with_disallowed_streams.cs
• src/EventStore.Core.Tests/Services/Storage/AllReader/when_reading_all_with_filtering.cs
• src/EventStore.Core.Tests/Services/Storage/HashCollisions/with_hash_collisions.cs
• src/EventStore.Core.Tests/Services/Storage/Scavenge/when_running_a_scavenge_from_storage_scavenger.cs
• src/EventStore.Core.Tests/Services/Transport/Enumerators/Enumerator.AllSubscription.CombinationTests.cs
• src/EventStore.Core.Tests/Services/Transport/Enumerators/Enumerator.AllSubscriptionFiltered.CombinationTests.cs
• src/EventStore.Core.Tests/Services/Transport/Enumerators/Enumerator.CombinationTests.cs
• src/EventStore.Core.Tests/Services/Transport/Enumerators/Enumerator.StreamSubscription.CombinationTests.cs
• src/EventStore.Core.Tests/Services/Transport/Grpc/StreamsTests/DeleteTests.cs
• src/EventStore.Core.Tests/Services/Transport/Grpc/StreamsTests/ReadStreamsForwardTests.cs
• src/EventStore.Core.Tests/Services/Transport/Http/Authorization/authorization_tests.cs
• src/EventStore.Core.Tests/Services/UserManagementService/user_management_service.cs
• src/EventStore.Core.Tests/Services/VNode/startup_should.cs
• src/EventStore.Core.Tests/TransactionLog/Truncation/when_truncating_database.cs
• src/EventStore.Core.Tests/Transforms/TransformTests.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterNodeOptionsTests/ClusterVNodeOptionsScenarios.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterNodeOptionsTests/when_building/with_cluster_node_and_custom_settings.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterNodeOptionsTests/when_building/with_single_node_and_custom_settings.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterNodeOptionsTests/when_building/with_tls.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterNodeOptionsTests/when_shutting_down_an_isolated_cluster_member.cs

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[cursor]

Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.

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