docs(policy-activity): note that Log action rules are not tracked

[tianfeng92]

Summary

• Add a limitation entry to the policy activity docs clarifying that action: Log rules do not appear in policy activity logs
• The Log action is a diagnostic tool (kernel log / eBPF trace pipe) outside the policy evaluation scope tracked by policy activity
• Only terminal actions (Allow, Deny, Pass) appear in policy activity logs

Test plan

• Verify the docs site builds without errors
• Review the limitation text for accuracy

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[dimitri-nicolo]

lgtm

[dimitri-nicolo]

@tianfeng92 Do you need to add this to the non-versioned docs as well?

[tianfeng92]

@tianfeng92 Do you need to add this to the non-versioned docs as well?

@dimitri-nicolo Good call. Just added

[dimitri-nicolo]

@tianfeng92 Do you need to add this to the non-versioned docs as well?

@dimitri-nicolo Good call. Just added

there should be the same doc file in the non-versioned docs that we need to update. I expect that once we've added the new docs the versioned and non-versioned changes should mirror each other, unless the docs have been refactored in the non-versioned docs.

[tianfeng92]

@dimitri-nicolo

@tianfeng92 Do you need to add this to the non-versioned docs as well?

@dimitri-nicolo Good call. Just added

there should be the same doc file in the non-versioned docs that we need to update. I expect that once we've added the new docs the versioned and non-versioned changes should mirror each other, unless the docs have been refactored in the non-versioned docs.

@dimitri-nicolo The original file for the incoming 3.23 EP2 was removed in a previous PR. I added calico-enterprise/observability/review-unused-network-policies.mdx as the completed user instruction.