feat: add SITENOVA_PAID_PLAN to subscription levels with detailed comments

[Artuomka]

Summary by CodeRabbit

• New Features
  • Added support for the SiteNova paid subscription plan, including flat-rate pricing with metered token overage.
  • The new plan is reported consistently with other paid subscription plans.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 0ffca129-d6f5-4ca1-9ae3-abaa124f8dea

📥 Commits

Reviewing files that changed from the base of the PR and between a12df24 and 569ffc9.

📒 Files selected for processing (1)

• backend/src/enums/subscription-level.enum.ts

Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review.

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📝 Walkthrough

Walkthrough

The subscription level enum adds SITENOVA_PAID_PLAN for SiteNova’s paid plan.

Changes

Subscription plan support

Layer / File(s)	Summary
Add SiteNova paid plan backend/src/enums/subscription-level.enum.ts	Adds the SITENOVA_PAID_PLAN enum member with its string value and paid-plan documentation.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Feature

Merge Risk: ⚪ Minimal · up to 569ff

The change adds the SiteNova paid-plan identifier without introducing a demonstrated runtime or integration risk.

🚥 Pre-merge checks | ✅ 6

✅ Passed checks (6 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: adding SITENOVA_PAID_PLAN to the subscription levels. The added comment detail is also consistent with the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
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.
Security Check	✅ Passed	The pull request changes only SubscriptionLevelEnum by adding SITENOVA_PAID_PLAN. It adds no endpoint, authentication change, user-controlled input, secret handling, or unsafe operation. The paid-…

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch backend_stripe_token_billing

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_{A rabbit found a plan in code
SiteNova paid along the road
Flat price set, tokens flow
The enum now helps systems know
Paid plans hop where they should go}

_{Comment @coderabbitai help to get the list of available commands.}