feat(core): import progress & perf (#15197)

#### PR Dependency Tree


* **PR #15197** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added a new import pipeline with “plan then commit” batch handling for
Markdown, Notion HTML, Obsidian, and Bear backups.
* Enabled native import sessions with progress, cancellation, and
batch-by-batch committing (including assets, folders, icons, and tags).
  * Added web preflight limits for ZIP and multi-file imports.
* **Bug Fixes**
* Improved import error/warning reporting and continued processing when
some items fail.
* Strengthened snapshot-based file/directory picking to preserve paths.
* **Chores**
  * Updated project packaging/configuration for the new import workflow.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/native/Cargo.toml

@@ -10,11 +10,8 @@ crate-type = ["cdylib"]
 
 [dependencies]
 aes-gcm = { workspace = true }
-affine_common = { workspace = true, features = [
-  "hashcash",
-  "napi",
-  "ydoc-loader",
-] }
+affine_common = { workspace = true, features = ["hashcash", "napi"] }
+affine_doc_loader = { workspace = true }
 anyhow = { workspace = true }
 assetpack-core = "0.1.0"
 assetpack-transform-precomp2 = "0.1.0"