feat(memory): add standalone Memory 2.1 runtime, multi-agent ingestion, and Viewer

[hijzy]

Summary

This PR decouples Memory from Memmy Agent into an independently versioned service and adds a complete local Viewer and multi-agent ingestion runtime.

Standalone Memory runtime

• Introduces the independently versioned Memory 2.1.0 service and CLI.
• Adds standalone installation, upgrade, migration, service lifecycle, release, and health-check support.
• Makes the Viewer version and memmy-memory --version derive from the Memory service version instead of the Memmy Agent version.
• Preserves the standalone Memory service lifecycle across desktop startup and shutdown.

Multi-agent memory ingestion

• Adds source adapters and integrations for:
  • Claude Code
  • Codex
  • Cursor
  • DeepSeek Harness
  • Hermes
  • OpenClaw
  • OpenCode
  • Pi
  • QwenWork
  • WorkBuddy
• Adds source-agent attribution, discovery, filtering, icons, log display, and secret redaction.
• Replaces Viewer namespace isolation with explicit agent-source identification.
• Adds capture deduplication and legacy local-plugin migration.

Memory Viewer

• Adds complete pages for memories, tasks, experiences, world models, skills, user memories, analytics, logs, and settings.
• Aligns list and detail presentation with the Memmy desktop UI.
• Adds agent filters and icons across Viewer pages.
• Adds working deletion actions to memory-layer and task detail drawers.
• Improves memory logs, task skip reasons, IDs, search controls, charts, and responsive layout.
• Uses the Memory health API as the Viewer version source.

Desktop integration

• Integrates the managed Memory service with the desktop runtime.
• Adds model-catalog projection and Memory model configuration.
• Updates onboarding, agent-source scanning, and first-encounter insight handling.
• Removes the legacy in-process SQLite memory client path.

Validation

• npm run typecheck
• npm test
• npm run build -w @memmy/memory
• Built memmy-memory --version output: 2.1.0

All type checks, builds, and test suites pass.