Add Fusion 15 execution tests

[michaelstaib]

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[github-actions]

Fusion Gateway Performance Results

Simple Composite Query

	Req/s	Err%
Constant 2 (50 VUs)	3258.19	0.00%
Ramping 2 (0-500-0 VUs)	3876.33	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	1.04ms	12.43ms	15.08ms	24.07ms	33.58ms	250.65ms
Ramping 2	1.27ms	51.25ms	56.26ms	97.99ms	142.69ms	280.29ms

---

Deep Recursion Query

	Req/s	Err%
Constant 2 (50 VUs)	732.92	0.00%
Ramping 2 (0-500-0 VUs)	885.94	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	11.73ms	59.51ms	65.72ms	84.44ms	102.29ms	717.58ms
Ramping 2	3.01ms	210.35ms	233.00ms	480.89ms	537.47ms	940.83ms

---

Variable Batching Throughput

	Req/s	Err%
Constant 2 (50 VUs)	5776.33	0.00%
Ramping 2 (0-500-0 VUs)	5050.38	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	0.15ms	8.06ms	8.55ms	14.20ms	17.48ms	62.74ms
Ramping 2	0.19ms	41.16ms	45.48ms	83.95ms	110.67ms	242.69ms

---

Runner 2 = benchmarking-2

Run 22439540699 • Commit eeab94e • Thu, 26 Feb 2026 11:25:28 GMT

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (22ba6d1) to head (f0369df).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff      @@
##   main   #9237   +/-   ##
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