BowEcho v0.34.8

BowEcho v0.34.8

This hotfix reduces background work while a live Level-II scan is still being
assembled, restores the fast Region velocity dealiaser as the default for new
or reset configurations, and removes local profile names from copied support
diagnostics.

Live radar performance

• Automatic rotation-marker processing now waits for a complete live scan
  instead of starting a new velocity analysis for every partial Level-II
  update.
• Rotation-track and TDS-track processing also skips preview and live-partial
  frames. The displayed radar can continue updating during the scan while the
  heavier background analysis runs once the frame is complete.
• Analyst v4 remains available as the higher-cost whole-volume option, and
  Region Global remains available as the Py-ART-style same-tilt option.

Velocity defaults and diagnostics

• New, reset, missing, and unrecognized dealias-engine settings now select the
  responsive same-tilt Region engine. Existing recognized engine selections
  remain respected.
• Copied diagnostics redact the local operating-system profile component from
  Windows and Unix paths, replacing it with <user> while retaining the useful
  remainder of each path.
• Diagnostics now report the selected dealias engine and whether rotation,
  TDS/rotation-track, and storm-track analysis workers are active.

Operational notes

• Every official release asset is built from the v0.34.8 tag by GitHub
  Actions. Matching .sha256 files are published beside the Windows, macOS,
  and Linux downloads.