infra: Add Grafana dashboard templates

[zeemscript]

Description:
Create Grafana dashboard templates in JSON format for visualizing application metrics. Include panels for key metrics like response times, error rates, and throughput.

Acceptance Criteria:

• JSON dashboard with core application metrics
• Panels for HTTP request rates and latency
• Error rate and status code distribution
• Database and cache performance metrics

Files to create:

• grafana/dashboards/application-overview.json - Main dashboard
• grafana/README.md - Dashboard import instructions

[sundayonuhadoyi-cmd]

@sundayonuhadoyi-cmd has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Good day maintainer, I’ve got the bandwidth for this issue. Mind assigning it to me?

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

[oycodes]

@oycodes has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I’ve reviewed the issue and would like to take this one up. I’m ready to get started.

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

[DevRushd]

@DevRushd has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would love to fix this issue. Kindly assign it to me.

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

[TS-mfon]

@TS-mfon has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

GM

I'm a Blockchain developer

Please can I work on this issue

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

[drips-wave]

Congratulations, @DevRushd! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @DevRushd: 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]

Congratulations, @DevRushd! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @DevRushd: 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 🌊