test(chain): Add comprehensive tests for min_confirmations parameter

test(chain): Add comprehensive tests for min_confirmations parameter

Add test file `tests/test_canonical_view.rs` with three comprehensive test cases:

1. `test_min_confirmations_parameter`: Tests basic min_confirmations functionality
   - Verifies min_confirmations = 0 and 1 behave identically
   - Tests edge case where transaction has exactly required confirmations
   - Tests case where transaction has insufficient confirmations

2. `test_min_confirmations_with_untrusted_tx`: Tests trust predicate interaction
   - Verifies insufficient confirmations + untrusted predicate = untrusted_pending
   - Ensures trust predicate is respected when confirmations are insufficient

3. `test_min_confirmations_multiple_transactions`: Tests complex scenarios
   - Multiple transactions with different confirmation counts
   - Verifies correct categorization based on min_confirmations threshold
   - Tests both min_confirmations = 5 and min_confirmations = 10 scenarios

These tests validate that the min_confirmations parameter correctly controls
when transactions are treated as confirmed vs trusted/untrusted pending.

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Co-Authored-By: Claude <noreply@anthropic.com>