fix(server): close the connection when the node body limit is exceeded

[dinwwwh]

When the Node `BodyLimitPlugin` rejects a request with 413, the response now carries `Connection: close`. Keep-alive clients open a fresh socket for their next request instead of failing with `ECONNRESET` after about 6 seconds. Closes #2205.

Fixes

• The 413 response tells HTTP/1 keep-alive clients not to reuse the socket. The plugin stops reading the body once the limit is hit, so that socket could never serve another request. The rest of the body is still not drained, so the limit keeps its purpose.
• Applies to both rejection paths: an oversized `content-length` and a body that grows past the limit while streaming.
• HTTP/2 responses are unchanged, with no header and no Node `UnsupportedWarning`. The header is also skipped when response headers have already been sent.

Testing

• New regression test replays the issue's setup (keep-alive agent, one socket): an oversized request, then a normal one. It covers both the `content-length` and the streamed body paths and checks for a 413 with `Connection: close`, then a 200. Both cases fail on the previous code.
• New HTTP/2 test checks that the 413 still arrives and the header is not set.
• `packages/server` and `packages/standard-server-node` suites pass (453 tests).

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commit: bb118df

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Status	Name	Latest Commit	Updated (UTC)
❌ Deployment failed View logs	orpc	90f2d8b	Oct 12 2026, 02:32 AM