Fix #5072 projection for unbound extension resolvers

[michaelstaib]

• skip queryable member projection for extension resolver fields that are not explicitly bound to a member
• keep explicit [BindMember] fields projectable
• add a regression test reproducing IsProjected(false) should not be required in extended types #5072 without requiring [IsProjected(false)]

Fixes #5072

[github-actions]

Fusion Gateway Performance Results

Simple Composite Query

	Req/s	Err%
Constant 2 (50 VUs)	3282.02	0.00%
Ramping 2 (0-500-0 VUs)	3772.88	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	1.10ms	12.22ms	14.96ms	24.27ms	33.78ms	256.88ms
Ramping 2	1.01ms	52.20ms	57.98ms	103.40ms	144.78ms	335.19ms

---

Deep Recursion Query

	Req/s	Err%
Constant 2 (50 VUs)	732.01	0.00%
Ramping 2 (0-500-0 VUs)	881.40	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	7.45ms	58.88ms	65.78ms	84.40ms	101.84ms	705.79ms
Ramping 2	3.12ms	211.27ms	234.12ms	481.51ms	540.57ms	982.56ms

---

Variable Batching Throughput

	Req/s	Err%
Constant 2 (50 VUs)	6078.59	0.00%
Ramping 2 (0-500-0 VUs)	5171.50	0.00%

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	0.15ms	7.69ms	8.13ms	13.45ms	16.60ms	53.23ms
Ramping 2	0.19ms	40.74ms	44.42ms	81.31ms	105.95ms	228.69ms

---

Runner 2 = benchmarking-2

Run 22419545507 • Commit 69d95c3 • Wed, 25 Feb 2026 23:23:01 GMT

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (2d71c65) to head (1cea212).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff      @@
##   main   #9224   +/-   ##
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