Fix #7609 interface/object reuse with oneOf inputs

[michaelstaib]

Summary

• add regression coverage for reusing the same DTOs as interface output types and oneOf input members
• make runtime type reference matching context-exact (Input/Output/None)
• allow fallback from specific contexts to None during runtime type lookups without treating None as a wildcard during registration checks

Fixes #7609

Validation

• Issue_7609 regression tests pass on net8/net9/net10
• TypeDiscovererTests and TypeInitializerTests pass on net8/net9/net10

[github-actions]

Fusion Gateway Performance Results

Progress: 0/6 benchmarks completed — this report updates as each job finishes.

Simple Composite Query

	Req/s	Err%
Constant 2 (50 VUs)	pending	pending
Ramping 2 (0-500-0 VUs)	pending	pending

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	pending	pending	pending	pending	pending	pending
Ramping 2	pending	pending	pending	pending	pending	pending

---

Deep Recursion Query

	Req/s	Err%
Constant 2 (50 VUs)	pending	pending
Ramping 2 (0-500-0 VUs)	pending	pending

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	pending	pending	pending	pending	pending	pending
Ramping 2	pending	pending	pending	pending	pending	pending

---

Variable Batching Throughput

	Req/s	Err%
Constant 2 (50 VUs)	pending	pending
Ramping 2 (0-500-0 VUs)	pending	pending

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 2	pending	pending	pending	pending	pending	pending
Ramping 2	pending	pending	pending	pending	pending	pending

---

Runner 2 = benchmarking-2

Run 22502551908 • Commit aab7c6f • Fri, 27 Feb 2026 20:26:19 GMT