feat(chart): add ha resource overrides

[coffeexcoin]

What changed

Adds role-specific resource overrides for HA mode in the abstract-node Helm chart:

• ha.core.resources for the HA core StatefulSet pod
• ha.api.resources for HA API Deployment pods

Both values default to {} and fall back to the existing top-level resources value when empty, preserving the current chart behavior for existing consumers.

Impact

HA users can size the stateful core pod separately from the horizontally-scaled API pods. Non-HA users continue to use top-level resources; HA users also continue to get top-level resources for both roles unless they opt into role-specific overrides.

Validation

• helm lint charts/abstract-node --set database.secretName=db-secret
• helm template abstract charts/abstract-node --set database.secretName=db-secret --set ha.enabled=true --set resources.requests.cpu=7 --set resources.requests.memory=30Gi --set resources.limits.cpu=7 --set resources.limits.memory=30Gi
• helm template abstract charts/abstract-node --set database.secretName=db-secret --set ha.enabled=true --set resources.requests.cpu=7 --set resources.requests.memory=30Gi --set resources.limits.cpu=7 --set resources.limits.memory=30Gi --set ha.api.resources.requests.cpu=1 --set ha.api.resources.requests.memory=4Gi --set ha.api.resources.limits.cpu=2 --set ha.api.resources.limits.memory=8Gi --set ha.core.resources.requests.cpu=6 --set ha.core.resources.requests.memory=28Gi --set ha.core.resources.limits.cpu=6 --set ha.core.resources.limits.memory=28Gi
• helm template abstract charts/abstract-node --set database.secretName=db-secret --set resources.requests.cpu=7 --set resources.requests.memory=30Gi --set ha.core.resources.requests.cpu=1 --set ha.api.resources.requests.cpu=1

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PR-Codex overview

This PR focuses on enhancing resource management in the Helm chart templates for deployments and stateful sets by introducing fallbacks to hierarchical resource definitions.

Detailed summary

• Updated deployment-api.yaml to use default for resources fallback.
• Modified statefulset.yaml to utilize ternary for conditional resource assignment.
• Added comments in values.yaml to clarify resource requests and limits for StatefulSet and Deployment pods.
• Introduced empty resources objects in values.yaml for both StatefulSet and API Deployment.

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