test(itest): integration test for token deposit/withdraw integer math against hathor-core #1711

[raul-oliveira]

Context

Follow-up from #1110, which refactored HTR token deposit/withdraw to integer math mirroring hathor-core #1711. That PR ships unit coverage only; an end-to-end integration test was intentionally deferred.

Goal

Add an integration test that exercises deposit/withdraw against a fullnode image containing hathor-core #1711, covering the large-amount precision case (amounts above 2^53, within MAX_OUTPUT_VALUE).

Blocker

The only published images with #1711 are 85 commits ahead of the pinned baseline and require a privnet config migration (feature-activation + nano-testnet-bravo vs privatenet test-mode rules) before the integration suite can run against them.

Acceptance Criteria

• Integration test covers large-amount deposit/withdraw (above 2^53) against a fullnode with #1711.
• Privnet/test config migrated so the suite runs green against the updated image.