fix(collector): leave Polymarket API rate headroom

[proerror77]

Change

Raise the shared Polymarket Data API request-start spacing from 100ms to 125ms. This keeps the production-plus-shadow rate below the documented 200 requests / 10 seconds limit instead of running exactly at it, which caused the formal Shadow Gate to fail on four HTTP 429 responses. The fail-closed health predicate remains strict and now requires the new spacing.

Issue relationship

None

Validation

• cargo test -p hft-collector --locked polymarket_raw (91 passed, 2 ignored)
• cargo clippy -p hft-collector --locked --all-targets -- -D warnings
• PATH="/opt/homebrew/opt/coreutils/libexec/gnubin:$PATH" bash deployment/aliyun/test-polymarket-raw-ops-control-plane.sh
• git diff --check

Runtime impact and rollback

The collector starts at most 8 Data API trade requests per second per process instead of 10, leaving headroom during production-plus-shadow overlap. The 200-poll cycle still has about 155 seconds of watchdog headroom. Roll back by redeploying the prior immutable Polymarket release; do not cut over unless the new formal Shadow Gate passes.

Summary by CodeRabbit

• Performance

  • Increased minimum spacing between Polymarket Data API requests from 100 ms to 125 ms.
  • Maintained a maximum of four concurrent requests.
  • Adjusted polling capacity and pacing calculations to provide additional request headroom.

• Reliability

  • Updated health-policy validation to enforce the safer request-spacing limit.

• Tests

  • Updated deployment and configuration checks to reflect the new 125 ms minimum.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: a39c48c1-74cd-4462-965e-cbbcde63fe82

📥 Commits

Reviewing files that changed from the base of the PR and between f801d1c and 526fb20.

📒 Files selected for processing (2)

• rust_hft/tools/collector/src/bin/polymarket-raw-ops.rs
• rust_hft/tools/collector/src/polymarket_raw.rs

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: b4356207-b563-4914-bb47-ba3c1f23b457

📥 Commits

Reviewing files that changed from the base of the PR and between bb8929e and f801d1c.

📒 Files selected for processing (5)

• deployment/aliyun/README.md
• deployment/aliyun/polymarket-reference-collector.service
• deployment/aliyun/polymarket-rust-health-policy.jq
• deployment/aliyun/test-polymarket-raw-ops-control-plane.sh
• rust_hft/tools/collector/src/polymarket_raw.rs

---

📝 Walkthrough

Walkthrough

The PR raises the minimum Polymarket trade request spacing from 100 ms to 125 ms. It updates Rust defaults, health validation, control-plane fixtures, and deployment pacing documentation.

Changes

Polymarket request spacing

Layer / File(s)	Summary
Update spacing contract and validation rust_hft/tools/collector/src/polymarket_raw.rs, deployment/aliyun/polymarket-rust-health-policy.jq	The minimum trade request spacing and default per-market delay increase to 125 ms. The default configuration test verifies the new value.
Align fixtures and deployment documentation deployment/aliyun/test-polymarket-raw-ops-control-plane.sh, deployment/aliyun/README.md, deployment/aliyun/polymarket-reference-collector.service	Control-plane fixtures use 125 ms as the valid value and 124 ms as the invalid value. Deployment documentation reflects 125 ms spacing and 1,440 request starts per cycle.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to f801d

The PR makes a localized request-spacing adjustment to add rate-limit headroom, with no actionable merge-blocking risk remaining after normal checks and review.

Possibly related PRs

• proerror77/monday#34: Introduces the request-spacing minimum, defaults, health policy, and control-plane tests updated here.
• proerror77/monday#37: Adds the 100 ms request-spacing constants, validation, documentation, and tests changed here.
• proerror77/monday#80: Modifies related Polymarket request-spacing validation and scheduling logic.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: increasing request spacing to leave Polymarket API rate headroom.
Description check	✅ Passed	The description includes all required sections and explains the change, issue relationship, validation, runtime impact, and rollback.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/polymarket-v2-rate-headroom

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