chore(release): v3.7.1 — all changes in ONE commit

CHANGELOG.md

@@ -36,6 +36,7 @@
 - **fix(codex):** Use per-conversation `session_id`/`conversation_id` from client body as `prompt_cache_key` instead of account-wide `workspaceId`. The official Codex CLI uses `conversation_id` (a unique UUID per session); using the shared `workspaceId` capped cache hit-rate at ~49%. Includes 10 unit tests (#1643).
 - **fix(claude):** Stabilize billing header fingerprint to prevent Anthropic prompt-cache prefix invalidation. The fingerprint was derived from the first user message text, which changes every turn, mutating `system[]` and forcing ~100% `cache_create`. Now uses a stable per-day hash, preserving ~96% `cache_read` hit rate (#1638).
 - **fix(transport):** Harden GitHub and Kiro streaming — thread `clientHeaders` through `BaseExecutor.buildHeaders()` to eliminate mutable singleton state race condition on concurrent requests. Remove redundant `[DONE]` stripping TransformStream from GitHub executor. Add defensive `parseToolInput()` for malformed Kiro tool call arguments. Hoist `TextEncoder`/`TextDecoder` to module singletons and use zero-copy `subarray()` (#1645 — thanks @dhaern).
+- **fix(transport):** Prevent memory bloat and database exhaustion from large, fragmented streaming responses. Implemented `ByteQueue` in `kiro.ts` for zero-copy binary accumulation, refactored `antigravity.ts` for incremental SSE parsing, and enforced a strict 512KB tiered truncation limit (`MAX_CALL_LOG_ARTIFACT_BYTES`) on stream request logs and call artifacts (#1647).
 - **chore(ci):** Update build environment dependencies — bump Node to `24.15.0`, `actions/checkout@v6`, `docker/build-push-action@v7`, pin `actions/setup-python` to major tag (#1646 — thanks @backryun).
 
 ### 📝 Documentation