Add tenacity retries to secrets file creation

[adamtheturtle]

This updates admin/create_secrets_files.py to use explicit tenacity retry policies for timeout-prone Selenium operations. Database and VuMark creation/detail retrieval now raise TimeoutException and are wrapped with retries that stop after three attempts with exponential backoff. The main loop now handles exhausted retries by resetting the driver and continuing to the next attempt, preserving the existing workflow while making retry behavior bounded and clearer. The tenacity call signatures were adjusted to keyword arguments to satisfy strict mypy checks in pre-push hooks.

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Note

Low Risk
Low risk: this only adjusts retry/timeout handling in an admin Selenium script, with bounded attempts and no production-path data/auth changes.

Overview
Improves robustness of admin/create_secrets_files.py by adding tenacity-based retries (3 attempts, exponential backoff) for timeout-prone Selenium calls when fetching Vuforia database and VuMark details.

Removes the previous None-return-on-timeout flow and instead raises TimeoutException after retries, with the main loop catching exhausted retries, resetting the Chrome driver, and continuing to the next file creation attempt.

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