Fix #6283 persisted-query hash-only websocket subscriptions

[michaelstaib]

Fixes #6283

• fix graphql-transport-ws subscribe payload parsing to include the schema IDocumentCache and IDocumentHashProvider
• this allows hash-only persisted operation payloads (extensions.persistedQuery) to be parsed into a request document id
• add a regression test that sends a websocket subscribe message with only persisted-query extensions (no query) and verifies subscription data is received

[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 1 (50 VUs)	pending	pending
Ramping 1 (0-500-0 VUs)	pending	pending

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 1	pending	pending	pending	pending	pending	pending
Ramping 1	pending	pending	pending	pending	pending	pending

---

Deep Recursion Query

	Req/s	Err%
Constant 1 (50 VUs)	pending	pending
Ramping 1 (0-500-0 VUs)	pending	pending

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 1	pending	pending	pending	pending	pending	pending
Ramping 1	pending	pending	pending	pending	pending	pending

---

Variable Batching Throughput

	Req/s	Err%
Constant 1 (50 VUs)	pending	pending
Ramping 1 (0-500-0 VUs)	pending	pending

Response Times

	Min	Med	Avg	P90	P95	Max
Constant 1	pending	pending	pending	pending	pending	pending
Ramping 1	pending	pending	pending	pending	pending	pending

---

Runner 1 = benchmarking-1

Run 22708142275 • Commit f13f666 • Thu, 05 Mar 2026 08:00:45 GMT

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (6a3b7a3) to head (e53e7c8).
⚠️ Report is 881 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #9246       +/-   ##
==========================================
- Coverage   74.16%       0   -74.17%     
==========================================
  Files        2677       0     -2677     
  Lines      140790       0   -140790     
  Branches    16371       0    -16371     
==========================================
- Hits       104421       0   -104421     
+ Misses      30774       0    -30774     
+ Partials     5595       0     -5595     

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