[haolpku]

Workspace publication previously copied the complete raw/KB/Graph/DB state for each revision. Add opt-in shared incremental storage with fixed native version bindings, plus configurable history retention without losing pinned reads or coordinated rollback.

• Share hashed source objects, vectors and parsed artifacts; reuse unchanged LanceDB rows, source-scoped indexed SQLite graph assertions, and Dolt table trees. Publication still uses one manifest and revision/epoch CAS.
• Add latest/recent/all retention, protected versions, durable reader leases, operation close, preview/apply GC and native compaction. New workspaces default to latest; existing histories remain all. Interrupted builds and private Dolt child processes recover without exposing partial output.
• Migrate the current legacy snapshot explicitly from frozen evidence/stored embeddings with no model calls; preserve old revision IDs until retention permits cleanup. Add CLI, HTTP/UI and MCP controls; update both packaged Skills and the Codex plugin.

Validation: 500 local tests passed, 40 skipped; strict optional-versioning suite 79 passed with no skips; real Dolt/LanceDB integration, all-surface migration, process-death/ABA/cancellation cases, cross-connector startup retry and concurrent legacy schema upgrades; installed-wheel smoke and SQLite demo passed. Browser verified saving/reloading retention and no JavaScript errors. All seven GitHub CI jobs passed on f9cc10f, including real MySQL/Dolt integration without skips: https://github.com/OpenDCAI/DataMind/actions/runs/39586609483. CI includes the new incremental and real-provider tests in required jobs.

Limits: single-host coordinator; incremental KB/DB require local LanceDB/Dolt and explicit setup/migration. Changed tables are replaced as a unit (no primary-key row upserts yet); source inventory/reference metadata still scale with total workspace size. Private Dolt SQL sessions currently serialize and start a local server per operation. See docs/WORKSPACE_STORAGE.md for setup, retention, migration and physical reclamation behavior.