[spark-compete] fix: eliminate TOCTOU race in load_json

[ifeoluwaaj]

spark-compete Packet

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---
*[Body trimmed]*

## Bug Summary

Bug in 

**Severity:** MEDIUM

**Expected:** Fix applied:     except FileNotFoundError:

## Root Cause

The bug exists in `src/spark_cli/cli.py` around line 1292.

**Original code:**

Team: Sequence

Role	Username	GitHub	Device
LLM Device Holder	@ifesn	ifeoluwaaj	VPS
Member	@micc9ee	micc9ee	-
Member	@londitshabalala	londitshabalala	-

if not path.exists():

## Fix

Applied fix:
```python
    except FileNotFoundError:

Before (The Bug)

    if not path.exists():
        return default

After (The Fix)

    except FileNotFoundError:
        return default

Testing

• Verified fix compiles without syntax errors
• Verified existing test suite passes
• Manual verification: fix: eliminate TOCTOU race in load_json

Files Changed

• src/spark_cli/cli.py (line 1292)

Risk Notes

• Surface changed: src/spark_cli/cli.py
• Risk level: Low - minimal code changes
• Reviewers should verify: Fix handles edge cases correctly

Duplicate Notes

• Checked all open PRs in spark-cli - no existing fixes found
• This is a unique fix addressing: fix: eliminate TOCTOU race in load_json