Build subscription pause/resume with billing adjustment

[Smartdevs17]

Context

Subscriptions need pause/resume with proper billing adjustment.

Current Limitation

Subscriptions can only be cancelled, not paused.

Expected Outcome

• Pause/resume functionality
• Billing adjustment for pause period
• Pause analytics
• Pause notifications

Acceptance Criteria

• Subscription pause with configurable duration
• Billing adjustment for pause period
• Resume with billing restart
• Pause analytics (pause rate, resume rate)
• Pause notifications
• Pause limits per subscription
• Pause documentation

Technical Scope

• contracts/subscription/src/ - Subscription contract
• backend/services/billing/ - Billing domain
• src/store/subscriptionStore.ts - Subscription store
• src/screens/ - Pause/resume UI

[Joyyyb]

@Joyyyb has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi Maintainer, I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Joyyyb to this issue.

[thisisouvik]

@Smartdevs17 I am confident that I can fix this issue kindly assign this to me.

[Dev-sandy1]

@Dev-sandy1 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Good day. I would like to work on these.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Dev-sandy1 to this issue.

[drips-wave]

Congratulations, @Dev-sandy1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Dev-sandy1: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @Dev-sandy1 as part of the Stellar Wave Program's 7th Wave 🥳

😎 @Dev-sandy1: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.