fix: auth scheduler env vars, concurrency and browser stability

docs/outcomes/FixAuthSchedulerEnvVars.md

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+# Outcome - Fix Auth Scheduler Env Vars
+
+## Summary
+Successfully fixed the environment variable loading issue in the authentication scheduler and updated the frequency configuration to support minutes.
+
+## Changes
+- **Refactored Scheduler Logic:**
+    - Updated `src/lib/server/scheduler.ts` to use `$env/dynamic/private` for reliable environment variable access.
+    - Changed configuration from `intervalHours` to `intervalMinutes`.
+    - Updated `startScheduler` to calculate interval in milliseconds based on minutes.
+- **Updated Documentation:**
+    - Updated `src/hooks.server.ts` JSDoc to reflect the new configuration.
+- **Updated Configuration:**
+    - Updated `.env.local` to set `AUTH_SCHEDULER_INTERVAL_MINUTES=5`.
+- **Verified Tests:**
+    - Updated `src/tests/scheduler.spec.ts` to mock `$env/dynamic/private` and verify the new logic.
+    - All tests passed.
+
+## Feature Branch
+`feature/FixAuthSchedulerEnvVars`