Add Property Price History

[LaGodxy]

Track price changes. Acceptance: Record changes, history endpoint, change percentage, chart data.

[Risktaker001]

@Risktaker001 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi, I’d like to work on issue #333. I can implement property price tracking with history storage, add a history endpoint, calculate change percentages, and prepare chart-ready data for visualization.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Risktaker001 to this issue.

[drips-wave]

Congratulations, @Risktaker001! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @Risktaker001: 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.

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