Feature/ci status watch

[shodiBoy1]

This PR adds ci status watch and external discussion observer workflows

Implemented changes:

• New ci-status-watch.yml weekday-morning workflow that lists the workflows currently red on main and posts them as a single Teams card, so a broken CI is noticed in the Daily. Reports current state (a workflow stays listed until it's green again); creates no issues. Read-only (actions: read).
• Extended issue-pr-observer.yml the daily digest now also reports new external GitHub Discussions (fetched via GraphQL, since they have no REST search). Issues/PRs and discussions are shown as two separate sections in the same card. Each source falls back to empty on error, so a failure in one still posts the other.

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Testing instructions

1. Make sure the repo secret TEAMS_WEBHOOK_URL is set (Teams incoming webhook).
2. CI status watch: Actions -> "CI status watch" → Run workflow. If any workflow on main is red, a card with the list appears in Teams; otherwise the run log says all green and nothing is posted.
3. Issue/PR/Discussion observer: Actions -> "External Issue, PR & Discussion Observer" -> Run workflow. New external issues/PRs/discussions from the look-back window appear as two sections; if there's nothing new, no message is sent.
4. Check the run logs each step prints how many items it found.

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Checklist for this PR

Make sure everything is checked before merging this PR. For further info please also see
our DoD.

• When running mvn clean test locally all tests pass and build is successful
• PR title is of the form #«issue-id»: «brief summary» (e.g. #921: fixed setup.bat). If no issue ID exists, title only.
• PR top-level comment summarizes what has been done and contains link to addressed issue(s)
• PR and issue(s) have suitable labels
• Issue is set to In Progress and assigned to you or there is no issue (might happen for very small PRs)
• You followed all coding conventions
• You have added the issue implemented by your PR in CHANGELOG.adoc unless issue is labeled
  with internal
• You have formulated clear instructions on how to test your contribution under "Testing instructions"

[coveralls]

Coverage Report for CI Build 28427239286

Coverage increased (+0.03%) to 71.372%

Details

• Coverage increased (+0.03%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	16275
Covered Lines:	12112
Line Coverage:	74.42%
Relevant Branches:	7286
Covered Branches:	4704
Branch Coverage:	64.56%
Branches in Coverage %:	Yes
Coverage Strength:	3.15 hits per line

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💛 - Coveralls