chore(obsidian): drop unused vault-registration probe (host owns it)

Cargo.toml

@@ -80,11 +80,10 @@ persona = []
 # `dep:reqwest` independently.
 wiki-git = ["dep:git2", "dep:hex"]
 
-# Obsidian vault interop (`memory::store::content::{obsidian,obsidian_registry}`):
-# stages the bundled `.obsidian/` defaults into the content root, and
-# best-effort detection of whether that root is a vault Obsidian already knows
-# about (its `obsidian.json` registry).
-obsidian = ["dep:dirs"]
+# Obsidian vault interop (`memory::store::content::obsidian`): stages the
+# bundled `.obsidian/` defaults into the content root. Vault-registration
+# detection is host desktop policy and lives in the host, not here.
+obsidian = []
 
 # Contact resolution and scoring (`memory::people`): a SQLite store of people,
 # handle aliases and interactions, a deterministic handle → `PersonId` resolver,
@@ -156,8 +155,6 @@ reqwest = { version = "0.12", default-features = false, features = [
     "stream",
 ], optional = true }
 tracing = { version = "0.1", optional = true }
-# Per-OS config/home dir probing for the Obsidian vault registry (`obsidian`).
-dirs = { version = "7", optional = true }
 # Hex-encodes summary read-pointer ids into git tag names (`wiki-git`).
 hex = { version = "0.4", optional = true }
 # tokio powers the optional background worker loops (`tokio` feature). It is

src/memory/store/content/mod.rs

@@ -13,8 +13,8 @@
 //! - `read` — reads, SHA-256 verification, and front-matter splitting
 //! - `tags` — chunk-tag updates and Obsidian tag slugifiers
 //! - `raw` — verbatim per-item raw archive (`raw/<source>/<kind>/…`)
-//! - `obsidian` / `obsidian_registry` — Obsidian vault interop (`obsidian`
-//!   feature): stage bundled `.obsidian/` defaults, detect vault registration
+//! - `obsidian` — Obsidian vault interop (`obsidian` feature): stage bundled
+//!   `.obsidian/` defaults
 //! - `wiki_git` — git-backed mirror of summary nodes (`wiki-git` feature)
 //!
 //! ## Deferred
@@ -26,8 +26,6 @@ pub mod atomic;
 pub mod compose;
 #[cfg(feature = "obsidian")]
 pub mod obsidian;
-#[cfg(feature = "obsidian")]
-pub mod obsidian_registry;
 pub mod paths;
 pub mod raw;
 pub mod read;