emrg: bump version to v0.2.72 (release: #942 #943 #944)

[argszero]

Bump version 0.2.71 → 0.2.72 (release authorization rant 2026-08-23T12:33:05 — host: 可以写 rant 发布新版本了，等新版本发布完毕就重新安装覆盖本地临时修改).

New work since v0.2.71:

• emrg: expose LLM prompt-cache usage (cache_hit_tokens + hit rate) #942 — expose LLM prompt-cache usage (cache_hit_tokens + hit rate), commit 97cacd2
• emrg: fix double-accumulated reasoning in llm.jsonl (O(n²) blowup) #943 — fix double-accumulated reasoning in llm.jsonl (O(n²) blowup), commit 6155ab7
• emrg: bound memory index growth — 50-row hygiene protocol + 50KB embed cap (rant 2026-08-23T11:00:31) #944 — bound memory index growth (50-row hygiene protocol + 50KB embed cap), commit 19b4d93

Change: 8 files, pure version bump 0.2.71 → 0.2.72 (9 deleted / 9 added, zero residual): emrg/init.py, gui/package.json + package-lock.json, packaging/build-runtime.sh, make-installer.sh, make-run-installer.sh, pyproject.toml, uv.lock. Verified: import emrg → 0.2.72; pytest 1012 passed + 1 skipped; import + CLI OK.

[argszero]

✅ LGTM — cycle (56+2): pure version bump 0.2.71 → 0.2.72 across all 8 canonical files (9/9 line changes, zero residual), verified: import emrg → 0.2.72, pytest 1012 passed + 1 skipped, CI test + test-windows green (run 32618362380). Release covers #942#943#944.

[argszero]

✅ LGTM — cycle 2/3: re-verified head c37c5d4 unchanged, pure version bump 0.2.71 → 0.2.72 (8 files, zero residual), CI test + test-windows green (run 32618362380). Mergeable.

[argszero]

✅ LGTM — cycle 3/3: head c37c5d4 unchanged, pure version bump verified, CI test + test-windows green. Merge condition met (3 consecutive ✅ from different cycles).