fix: Fix RPM prerelease ordering and start xrpld on DEB install

[legleux]

Summary

1. Fix RPM prerelease version ordering so newer beta builds sort correctly, e.g. b6 upgrades from b5.
2. Start xrpld.service on fresh DEB installs while avoiding an immediate restart during DEB upgrades.

Details

1. The RPM packaging version logic now preserves the expected prerelease ordering for beta builds. This prevents package managers from treating an older beta build as newer or refusing the expected b5 → b6 upgrade path.

2. For DEB packaging, xrpld.service now uses dh_installsystemd --no-stop-on-upgrade. This starts the service after a fresh install, but avoids stopping/restarting an already-running daemon during package upgrades.

The update-xrpld timer remains configured with --no-start.

Testing

• Verified RPM package ordering for the affected beta versions.
• Verified fresh DEB install starts xrpld.service.
• Verified DEB upgrade does not immediately restart xrpld.service.
• Verified update-xrpld.timer is not started.

[xrplf-ai-reviewer]

No issues.

Review by Claude Opus 4.6 · Prompt: V15

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.3%. Comparing base (3547a93) to head (2f092d6).

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #7313     +/-   ##
=========================================
- Coverage     82.4%   82.3%   -0.0%     
=========================================
  Files         1011    1011             
  Lines        76248   76248             
  Branches      7313    7311      -2     
=========================================
- Hits         62793   62777     -16     
- Misses       13455   13471     +16     

see 8 files with indirect coverage changes

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[Copilot]

Pull request overview

Adjusts packaging behaviors so pre-release RPM builds sort/upgrade correctly and Debian installs start xrpld by default without forcing a stop during upgrades.

Changes:

• Fix RPM Release construction for pre-releases to preserve expected rpmvercmp ordering across beta builds (e.g., b5 -> b6).
• Update Debian dh_installsystemd invocation so xrpld.service starts on fresh install while avoiding stop-on-upgrade behavior.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
package/debian/rules	Switches dh_installsystemd options so xrpld.service is started on fresh installs but not stopped during upgrades.
package/build_pkg.sh	Changes RPM pre-release Release formatting to 0.<pkg_release>.<suffix> to maintain correct prerelease ordering.

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