Add configurable replicas to MCPServer spec

[matzew]

Allow users to scale MCP server deployments by specifying a replica count in the CR spec. Defaults to 1 when not specified

[matzew]

/assign @aliok

Not sure if also scope of #40 - but we must be able to have scaling to more than just one instance

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In response to this:

/assign @aliok

Not sure if also scope of #40 - but we must be able to have scaling to more than just one instance

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[mrunalp]

@matzew Thanks for adding this!

[mikebrow]

LGTM nice..

[matzew]

/assign @ArangoGutierrez

[ArangoGutierrez]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ArangoGutierrez, matzew, mikebrow

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