Replace boolean bypass logic with bypassDecision enum (decisionBypass/decisionProxy),
consolidate four matcher fields into a single patternSet struct for atomic swaps,
extract classifyPatterns as a pure function, and remove unused matched() method
and slices import. Add 204 lines of tests covering decisions, pattern sets,
and group evaluation logic.
- 88 tests: 70 for core (96.8%), 12 for gRPC plugin, 14 for HTTP plugin
- Cover all matchers (IP, CIDR, wildcard, IP range), loader sources,
bypassGroup logic, periodReload, and plugin fail-open semantics
- Add nil-logger guard in httpPlugin.Contains to prevent panic
when logger is nil
ginuerzh