fix: unit test coverage gap in configuration repositories

[Justus-at-Tazama]

SPDX-License-Identifier: Apache-2.0

Problem

The global Jest coverage threshold for functions is set to 95%, but current function coverage is 92.12%, causing the test run to exit with code 1 even though all tests pass.

This gap was introduced by PR #331 (feat-paysys-test-coverage), which added coverage for simulation, masking, and TCS config services but left three repository files in src/repositories/configuration/ with low function coverage:

File	Statements	Functions	Lines
network.map.repository.ts	44.95%	33.33%	44.95%
rule.config.repository.ts	57.14%	40%	57.14%
typology.config.repository.ts	57.14%	40%	57.14%

Impact

• npm test exits with code 1 on both dev and any branch merged from dev
• Husky pre-push hooks fail, blocking all pushes from local machines
• This is a pre-existing issue from release 3.0.0

Required fix

Add unit tests for the uncovered functions in the three files above to bring global function coverage back above 95%.