[main] expose VectorSetReplayTaskCount parameter (#1703)

[vazois]

No description provided.

[Copilot]

Pull request overview

Exposes a new configuration parameter to control how many tasks are used to replay VectorSet operations on replicas, wiring it through server options, defaults, and test utilities.

Changes:

• Add VectorSetReplayTaskCount to server options/config (defaults + CLI parsing) and propagate through test cluster/server creation helpers.
• Update VectorManager to size replay task arrays and locks based on the configured count (with a runtime range check).
• Update GarnetServer to pass full GarnetServerOptions into VectorManager.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/Garnet.test/TestUtils.cs	Adds plumbing to pass vectorSetReplayTaskCount into GarnetServerOptions in test helpers.
test/Garnet.test.cluster/ClusterTestContext.cs	Exposes vectorSetReplayTaskCount on cluster test context helpers and forwards it to test utilities.
libs/server/Servers/GarnetServerOptions.cs	Adds VectorSetReplayTaskCount to the public server options surface.
libs/server/Resp/Vector/VectorManager.cs	Uses VectorSetReplayTaskCount to size replay task arrays/locks and adds a runtime range check.
libs/host/defaults.conf	Adds default config entry for VectorSetReplayTaskCount.
libs/host/GarnetServer.cs	Updates VectorManager construction to accept GarnetServerOptions.
libs/host/Configuration/Options.cs	Adds CLI/config option --vector-set-replay-task-count and maps it into GarnetServerOptions.

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