fix(glm): preserve and compose OpenAI recovery requests

[diegosouzapw]

GLM OpenAI requests could retry with a corrected reasoning body but return the rejected original body to the caller. Known-field HTTP 400s also bypassed recovery, and later calls repeated an already learned reasoning rejection.

The executor now adopts the body sent by recovery, composes the existing bounded field-downgrade helper, and applies only previously learned reasoning limits before sending the next OpenAI request. The caller input, model/provider identity, headers, abort signal, and Anthropic transport contract are preserved. No shared recovery helper is changed.

Refs #14629

This is the GLM/OpenAI portion of the umbrella issue. NineRouter is covered separately by #16133; CLIProxyAPI and CommandCode residuals are still being handled.

Validation

Three TDD stages on exact base 122b43b35dbacab03ea67d0f0b46e713280ccd86, with an identical fixture hash within each failing/passing pair:

• Returned body: 1 failure and 1 control, then 2/2 passed.
• Known-field 400 and reasoning-to-field chain: 2 failures and 2 controls, then 4/4 passed.
• Learned limits across all three reasoning carriers: 3 failures and 4 controls, then 7/7 passed.

The final focused matrix passed 18/18, including retry bounds, explicit reasoning 422 versus generic field 422, model/provider separation, Anthropic controls before and after learning, and useful SSE output.

The 36-file importer/related selection initially produced 343 tests: 339 passed and 4 failed because the temporary deny-all network guard blocked real process-owned loopback servers in one existing redirect fixture. That file was rerun with only its own bound loopback ports admitted: 14/14 passed. Both runs are retained; no test or production code was changed to fix the harness, and the initial run is not reported as a fully green run or a base defect. External traffic remains blocked.

Core/dashboard typechecks, both complexity gates, focused ESLint/Prettier, file-size, changelog integrity, and test discovery passed. Independent SPEC/Standards review found no blockers and verified excluded dependencies remained unchanged. Tests use synthetic state and intercepted transport; no live GLM account or release deployment was exercised.

Normal automatic commit hooks passed with all three file hashes unchanged. PR source/test, anti-masking, and evidence policies passed against the actual committed diff before publication. Hosted CI and merge are pending.

[github-actions]

CI Coverage Report

• Coverage job: skipped
• PR test policy: success

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