fix(adapters): preserve long tool names across Chat Completions

[MisterWanted]

Summary

• Rescue the unlanded tool-wire-name-limit intent onto current main without changing the original dirty worktree.
• Add a request-local reversible codec for Chat Completions function names: 64 ASCII characters, collision-safe aliases, stable declaration/choice/history mapping, and restoration for JSON and streamed tool calls.
• Preserve original call IDs, arguments, namespaces and all already-valid names. Add boundary, collision, orphan-history, parallel-call and round-trip regressions plus adapter documentation.

Verification

• bun test tests/adapter-usage.test.ts tests/openai-chat*.test.ts: 97 passed, 0 failed, 382 assertions.
• bun run typecheck, bun run privacy:scan, git diff --check: passed.
• cd docs-site && bun install --frozen-lockfile && bun run build: passed, 156 pages.
• Full bun run test: NOT GREEN. Repository watchdog ended both seven-minute attempts (841 seconds total, exit 137) on a heavily contended eight-thread host. The old orphan-alias assertion was fixed with round-trip coverage; unrelated stream/timing failures and catalog/desktop timeouts are not claimed resolved. A main-runtime baseline is being checked separately.
• Draft intentionally requests remote exact-head CI; no merge or deployment readiness claimed. Duplicate local pre-push execution was skipped for this task-branch upload after the above recorded checks, not a merge-check waiver.

Linear

• Issue: GRO2-1560 — existing OpenCodex release-convergence campaign.

Checklist

• Scope stays focused and preserves unrelated work.
• Adapter documentation updated and built.
• Full exact-head CI and independent maintainer approval complete.

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📥 Commits

Reviewing files that changed from the base of the PR and between 1e07891 and e2ef5bc.

📒 Files selected for processing (5)

• docs-site/src/content/docs/reference/adapters.md
• src/adapters/openai-chat-tool-names.ts
• src/adapters/openai-chat.ts
• tests/adapter-usage.test.ts
• tests/openai-chat-tool-names.test.ts

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