[codex] Fix Firestore GetQueryNamed runtime drift

[AdamEssenmacher]

Summary

This PR starts the runtime-failure drift remediation loop with the first concrete case: cloudfirestore-getquerynamed.

It does three things:

• fixes the Firestore binding for getQueryNamed:completion: so it binds NSString as string instead of NSInputStream
• adds a reusable targeted E2E mode (--runtime-drift-case <id>) for one drift case at a time
• adds a checked-in backlog and case manifest so future runtime-failure drifts can follow the same proof/fix/verify pattern

Runtime failure proof before the fix

I first ran the new targeted lane against the unfixed binding locally:

tools/e2e/run-firebase-foundation.sh --package-dir output --configuration Debug --runtime-drift-case cloudfirestore-getquerynamed

That produced the expected binding-layer failure proof in:

• tests/E2E/Firebase.Foundation/artifacts/firebase-foundation-result-cloudfirestore-getquerynamed-failure.json
• tests/E2E/Firebase.Foundation/artifacts/firebase-foundation-sim-cloudfirestore-getquerynamed-failure.log

The captured evidence was:

• selector: getQueryNamed:completion:
• runtime argument type: Foundation.NSInputStream
• managed exception: ObjCRuntime.ObjCException
• native exception: NSInvalidArgumentException
• native reason: -[__NSCFInputStream length]: unrecognized selector sent to instance ...

Fix and regression validation

After fixing the binding, I reran the same targeted lane and it passed:

• tests/E2E/Firebase.Foundation/artifacts/firebase-foundation-result-cloudfirestore-getquerynamed-success.json
• tests/E2E/Firebase.Foundation/artifacts/firebase-foundation-sim-cloudfirestore-getquerynamed-success.log

The success result shows:

• selector getQueryNamed:completion: completed without ObjCException
• runtime argument type: System.String
• callback invoked: True
• returned query was null for the unknown named query: True

I also reran the default smoke lane to ensure the new targeted-mode plumbing did not break the ordinary E2E harness.

Validation

Commands used locally:

dotnet tool restore
dotnet pack source/Firebase/CloudFirestore/CloudFirestore.csproj --configuration Release --output output
tools/e2e/run-firebase-foundation.sh --package-dir output --configuration Debug --runtime-drift-case cloudfirestore-getquerynamed
tools/e2e/run-firebase-foundation.sh --package-dir output --configuration Debug

Notes

• The backlog entry stays under Ready in this PR and should move to Done only after merge, per the loop rules.
• This PR is intentionally scoped to one runtime-failure drift plus the reusable harness needed to repeat the process.

[AdamEssenmacher]

@codex review

[chatgpt-codex-connector]

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