Cross-session memory plugin for DSH

Key features

• Global SoulPersistent identity across all workspaces via /.dsh/soul.md
• Zero-config — works out of the box with SQLite FTS5 and DSH's built-in LLM.
• Auto ExtractionExtracts facts, preferences, decisions, and context from conversations
• Cross-Session RecallFTS5 keyword recall injected into the system prompt every turn (recency fallback when no query text is available)
• Context Explosion PreventionToken budget management prevents context window overflow