Update authenticator.py testing 2

[Nexorax-nk]

feat: add retry strategy to authenticator testing 2

[github-actions]

🧠 KRONOS: 5-Layer Multi-Agent Analysis

Layer 1: Memory Guard 🔴
CRITICAL CONFLICT DETECTED. This PR introduces "Exponential Backoff" in the retry strategy. According to KRONOS-MEMORY-001 (Decided on 2026-01-15 by @alice), this exact pattern was explicitly rejected.
Reasoning: Exponential backoff previously caused a massive thundering herd effect when dealing with 1000+ concurrent requests, bringing down the auth service for 2 hours. We must use fixed retry intervals instead.

Layer 2: Promise Audit 🔴
The PR title says "Add retry logic", but the code implements a rejected backoff strategy. This violates the established architectural promise for the auth service.

Layer 3: Security Shield 🟢
No immediate security regressions detected (SQLi, XSS, exposed secrets).

Layer 4: Architecture Insight 🔵
Detected architectural changes: new dependency pattern (ExponentialBackoff). This represents technology drift from our standard FixedIntervalRetry utility.

Layer 5: Doctrine Engine 🔵
Code style passes, but please remember to use type hinting on the retry_strategy object as discussed in previous reviews.

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⚡ Action Required

Please reply to this comment with one of the following commands:

• kronos: intentional — [reasoning] (Override the decision. Memory will evolve.)
• kronos: accidental — (Acknowledge and fix the code.)
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