fix(memos-local-plugin): harden Hermes install and startup recovery

[yyswhsccc]

Summary

Fixes #1744.

• install the Hermes provider into the durable user-plugin path ~/.hermes/plugins/memtensor, while still writing the legacy ~/.hermes/hermes-agent/plugins/memory/memtensor compatibility link when that source-tree path exists
• mirror the durable provider link in the Windows installer and adapter installer helper
• defer dirty closed episode reward rescore out of startup init() so the bridge can become responsive while recovery continues in the background
• add focused tests for the durable install contract and async dirty-rescore behavior

Validation

• bash -n install.sh adapters/hermes/install.hermes.sh
• npx vitest run tests/unit/install/install-sh.test.ts -t "durable user-plugin"
• npx vitest run tests/unit/pipeline/memory-core.test.ts -t "rescoring"
• npm run lint
• python -m pytest apps/memos-local-plugin/tests/python -q (33 passed after installing PyYAML in the isolated local test venv)

Note: npx vitest run tests/unit/install/install-sh.test.ts tests/unit/pipeline/memory-core.test.ts also passed the install test file, but the broader memory-core.test.ts run still reports three unrelated existing namespace/topic behavior failures outside this patch scope.