feat(listeners): implement idempotent restart from persisted cursor

[afeezorobsco-cyber]

##close #575

Description

This PR implements idempotent restart behavior for the Horizon Bond Creation listener by restoring the last persisted cursor on startup instead of always starting from now.

On startup, the listener loads the saved paging_token from the existing horizon_cursors table using CursorRepository. If no checkpoint exists or the lookup fails, it safely falls back to now, preserving the existing cold-start behavior.

Changes

• Restore the persisted cursor before opening the Horizon stream
• Fall back to now when no checkpoint exists or the lookup fails
• Add unit tests covering resume, missing checkpoint, and database failure scenarios
• Update the Horizon listener documentation

This implementation is additive, introduces no schema or configuration changes, and aligns the bond creation listener with the existing restart behavior used by the other Horizon listeners.

Closes #

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[Baskarayelu]

implement idempotent restart from persisted cursor — clean work, in it goes 🚀