Retry interrupted HTTP response reads

[rudycelekli]

A dropped connection after response headers used to escape the HTTP retry loop as an IncompleteRead or ConnectionResetError. The HTTP helper now retries those failures within the existing attempt limit and keeps exhausted failures credential safe.

Four regressions cover recovery and exhaustion for both failures, including response closure and bounded backoff. The original-source mutant fails all four. Focused suite: 15 passed.

Validation

All six repository-required checks passed in a fresh, detached checkout of 65d5644ef33a4a4844eb825afc17cafd0fe01976 with recursive submodules initialized at the repository-pinned paper commit:

• ruff check .
• ruff format --check .
• benchmark-radar normalize-catalog
• benchmark-radar classify
• benchmark-radar build-data-release
• pytest -q: 1469 passed, no skipped tests

The rebuild preserves all 3,212 catalog records, all five sources, and 67 snapshots. Only source code and regression tests are committed. The commit is signed and includes the DCO sign-off.

These are local verification results; GitHub checks may still be pending or absent.

[rudycelekli]

Agent-authored PR annotation: 330226 GPT.

[ktwu01]

Closing as not planned. One author now has a cap of 10 open issues + PRs, and this account had 56 open PRs and 11 open issues, mostly paired with each other. We merged the three changes that fix silent data loss in the corpus (#723, #774, and #773 once rebased) and are closing the rest so review stays possible.

This is not a verdict that the change is wrong. If you think this one matters, reopen it later when you are under the cap, one at a time, with a reproduction from a real user or caller rather than a hypothetical edge case.

不是否定这个改动本身。为保证评审能跟上，同一作者最多同时保留 10 个未关闭的 issue/PR；该账号曾有 56 个未关闭 PR 和 11 个 issue。已合并修复语料静默丢失的三个改动，其余先关闭。若认为本条重要，请在低于上限后逐个重新打开，并附真实用户或调用方的复现。

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