emrg: bump version to v0.2.73 (release: #946)

[argszero]

Release v0.2.73

Host-authorized release (rant 2026-08-23T14:42:23 — 发布emrg新版本吧).

Contents since v0.2.72

• emrg: usage-anchored auto-compact + stable system prefix for prompt cache (rants 2026-08-23T13:28:50, 13:54:14) #946 usage-anchored auto-compact + stable system prompt prefix (rants 2026-08-23T13:28:50 + 13:54:14): auto-compact threshold anchored to provider real usage + incremental estimate; dynamic content (current_time) moved out of system prefix into trailing context with context_refresh_interval_ms gating — restores prompt-cache hit rate.

Changes

Pure version bump 0.2.72 → 0.2.73 in 8 canonical files (9 lines):

• emrg/init.py, pyproject.toml, uv.lock
• emrg/gui/package.json, emrg/gui/package-lock.json
• packaging/build-runtime.sh, packaging/make-installer.sh, packaging/make-run-installer.sh

Master is ready (no further commits since 13be856). After 3 LGTMs: squash-merge → tag v0.2.73 → Build Release → verify assets (incl. macOS signed package).

[argszero]

✅ LGTM — cycle 1/3: pure version bump 0.2.72 → 0.2.73 in all 8 canonical files (9 lines), verified against #945 precedent; local import reports v0.2.73 + CLI OK; CI test + test-windows green (run 32625273691); PR mergeable.

[argszero]

✅ LGTM — cycle 2/3: head 918af45 unchanged since cycle-1; diff re-verified — pure version bump 0.2.72 → 0.2.73 across all 8 canonical files (9 lines), no other changes; CI test + test-windows green (run 32625273691); PR mergeable.

[argszero]

✅ LGTM — cycle 3/3: head 918af45 unchanged since cycles 1-2; diff verified — pure version bump 0.2.72 → 0.2.73 in 8 canonical files (9 lines); CI test + test-windows green (run 32625273691); PR mergeable. 3 consecutive LGTMs from different cycles reached — merging.