fix(frontier): default billing refresh intervals to frontier defaults instead of disabling sync

[rohilsurana]

Problem

The frontier chart sets four billing refresh interval env vars to 0 on frontier-app:

FRONTIER_APP_BILLING_REFRESH_INTERVAL_CUSTOMER: 0
FRONTIER_APP_BILLING_REFRESH_INTERVAL_SUBSCRIPTION: 0
FRONTIER_APP_BILLING_REFRESH_INTERVAL_CHECKOUT: 0
FRONTIER_APP_BILLING_REFRESH_INTERVAL_INVOICE: 0

An interval of 0 disables that background sync job entirely. For invoice this also disables monthly credit overdraft invoice generation.

Today these var names are not read by frontier: billing is a top-level config key (not under app), and since frontier v0.100.0 (raystack/frontier#1332) the env prefix is FRONTIER_SERVICE_. So frontier silently runs on its built-in defaults. But the chart's stated default is still "disable all billing sync", and if the env var naming is ever aligned with frontier's config, deployments that do not run the worker would silently stop generating invoices.

Change

• Change the default values from 0 to frontier's built-in defaults: 1m for customer/subscription/checkout, 5m for invoice, so the chart's stated defaults match frontier's actual behavior.
• Keep the existing FRONTIER_APP_ prefix for consistency with the rest of the chart's config keys; aligning names with frontier's current env binding can be done separately.
• Bump chart version to 0.3.2.

helm lint stable/frontier passes (pre-existing warnings about missing subchart deps and icon only).

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 41449422-b1e0-405d-ba57-4efaa1a96805

📥 Commits

Reviewing files that changed from the base of the PR and between 5784914 and 85a4789.

📒 Files selected for processing (2)

• stable/frontier/README.MD
• stable/frontier/values.yaml

📝 Walkthrough

Walkthrough

This pull request updates the stable/frontier Helm chart by renaming billing refresh interval environment variables from FRONTIER_APP_BILLING_REFRESH_INTERVAL_* (integer, defaulted to 0) to FRONTIER_SERVICE_BILLING_REFRESH_INTERVAL_* (string, minute-based defaults: "1m" for checkout/customer/subscription and "5m" for invoice) in values.yaml, with corresponding documentation updates in README.MD. The chart version in Chart.yaml is incremented from 0.3.1 to 0.3.2.

Compact metadata:

• Type: Configuration/documentation update
• Files changed: 3 (Chart.yaml, README.MD, values.yaml)
• Lines changed: +14/-9

Related issues: None specified

Related PRs: None specified

Suggested labels: helm-chart, configuration, documentation

Suggested reviewers: None specified

Poem:
A rabbit hopped through YAML fields so neat,
Swapped app for service, made the intervals sweet.
From zero to minutes, the billing now ticks,
One-em and five-em, clever little tricks.
Version bumped up, the changelog complete! 🐰

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: switching Frontier billing refresh intervals from disabled to default working values.
Description check	✅ Passed	The description is directly related to the chart updates, env var rename, default values, and version bump.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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