[Backend] -- Add Transaction Receipt Generation

[Devsol-01]

Description:
Generate PDF receipts for all transactions with transaction details, blockchain verification, and company branding.

Acceptance Criteria:

• Install PDF generation library
• Design receipt template
• Implement receipt generation service
• Add receipt download API
• Include blockchain verification info
• Add receipt email delivery
• Store receipts in cloud storage

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[Ahmedscreativeverse]

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

i can fix this

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

[favvy0217]

@favvy0217 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

i would love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @favvy0217 to this issue.

[drips-wave]

Congratulations, @favvy0217! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @favvy0217: 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

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