Prevent default labels from being forwarded

[cbartz]

Applicable spec: ISD-116

Overview

Do not forward the default self-hosted labels.

Rationale

These labels should be ignored, they have no effect on routing decisions. They are currently forwarded and must be ignored again by the consumer side.

Juju Events Changes

n/a

Module Changes

parse.py: Remove ignored labels from webhooks.
router.py: Remove ignore labels from routing table, as they are already removed during parsing.

Library Changes

n/a

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated
• The PR is tagged with appropriate label (urgent, trivial, complex)

[github-actions]

Test coverage for 7993ec5

Name                           Stmts   Miss Branch BrPart  Cover   Missing
--------------------------------------------------------------------------
webhook_router/__init__.py         0      0      0      0   100%
webhook_router/app.py            104      0     32      0   100%
webhook_router/mq.py              22      0      7      0   100%
webhook_router/parse.py           53      0     18      0   100%
webhook_router/router.py          44      0     16      0   100%
webhook_router/validation.py       6      0      0      0   100%
--------------------------------------------------------------------------
TOTAL                            229      0     73      0   100%

Static code analysis report

Run started:2024-09-26 08:46:29.633708

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 1753
  Total lines skipped (#nosec): 7
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):

[yanksyoon]

LGTM

[jdkandersson]

Just one comment left from the earlier review