Temporarily remove spark balance workaround

[jbojcic1]

I want to temporarily remove this and verify if that 0 balance bug is also happening due to Spark SDK stream connection issues.

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Project	Deployment	Actions	Updated (UTC)
agicash	Ready	Preview, Comment	Mar 30, 2026 2:20pm

[orveth]

clean removal — no leftover references, imports correctly dropped, balance logic still works.

two things:

1. stale comments above updateSparkAccountBalance still reference the workaround that no longer exists ("This is used for a Spark bug workaround...", "TODO: Update when Spark bug is fixed"). worth cleaning up or removing since the function now does the simple thing those comments wished for.

2. the old code gated updates on versionOk ordering — that's gone now. fine for a diagnostic change, but if this sticks around longer term, worth thinking about whether you still want version ordering to prevent stale updates from racing.

otherwise looks good, makes sense as a diagnostic step alongside #964's debug logging.