fix: Answer unhandled REST requests with a not found error

[joamag]

Fixes OMNI-LDJ-14.

Cause

A request whose path is matched by no route of the REST service plugins raises RESTRequestNotHandled (rest/src/rest/system.py), which, unlike its siblings MVCRequestNotHandled and the RequestNotHandled of the colony HTTP handler, carries no status_code. The WSGI handler falls back to 500 for exceptions without one, so the client receives an internal error, the exception is logged with error verbosity and it reaches Sentry through the logging handler, as the client error filter of #45 only recognises the exceptions that carry a 4XX status code.

The Sentry event has no request context (URL, method) because request.begin is only notified once a route matches, which never happens for these requests.

Changes

• RESTRequestNotHandled takes a status_code defaulting to 404, mirroring MVCRequestNotHandled, so the WSGI handler answers with a not found error, logs it with debug verbosity and Sentry ignores it as a client error
• CHANGELOG entry under Fixed

Verification

• test_handle_request_not_handled routes a request with no REST service plugin and with one whose routes do not match, asserting the error and its 404 status code, then registers a matching route to confirm that the lack of it was the cause
• test_rest_request_not_handled asserts the default status code and test_rest_request_not_handled_custom_status a provided one
• The 3 tests fail against the previous code ('RESTRequestNotHandled' object has no attribute 'status_code') and pass with the change
• 100% coverage of the changed statements (4 of 4), measured with coverage.py
• Complete suite passing locally (23 bundles, 1282 tests) and black --check clean

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• CHANGELOG.md
• rest/src/rest/exceptions.py
• rest/src/rest/test.py

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[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-01T07:40:28.229608Z	a90f577	Manual request

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[joamag]

@codex review

[Copilot]

Copilot review overview

🟢 Approval recommended

The focused, backward-compatible change matches established MVC behavior and has appropriate regression coverage.

Review effort: Balanced
Findings: None

What changed in this PR

Adds HTTP 404 handling for unmatched REST routes, preventing false server errors and Sentry reports.

Changes:

• Adds a default/custom status code to RESTRequestNotHandled.
• Tests unmatched routing and exception status codes.
• Documents the fix.

File	Description
rest/​src/​rest/​exceptions.py	Adds the default 404 status code.
rest/​src/​rest/​test.py	Covers unmatched routes and status codes.
CHANGELOG.md	Records the corrected behavior.

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[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Hooray!

Reviewed commit: a90f577333

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[joamag]

LGTM