docs(fs): enumerate absence observation paths

packages/fs/fs-policy/README.md

@@ -39,7 +39,7 @@ Three `fs/*` events (declared by `@deepseek-ai/dsh-fs`, dispatched by `@deepseek
 
 ## Observed state is the prior-observation record; freshness is provider CAS
 
-Observed state is a weak owner-to-target map with three logical states: unseen, confirmed absent, or present at a version. A successful file read or mutation records presence; a `read`/`view` metadata miss records absence before returning `FS_NOT_FOUND`. The plugin performs no filesystem I/O: it converts that state into a provider guard. Presence supplies the observed version, while absence lets only a `createIfAbsent` write proceed; edit has no version basis and returns `FS_NOT_FOUND`. A windowed read observes the whole file version, so a later targeted edit is allowed only while that file remains unchanged. State is discarded on plugin disposal and is not persisted across sessions.
+Observed state is a weak owner-to-target map with three logical states: unseen, confirmed absent, or present at a version. A successful file read or mutation records presence; a metadata miss from `read` or the `str_replace_editor` `view`, `str_replace`, or `insert` command records absence before returning `FS_NOT_FOUND`. The plugin performs no filesystem I/O: it converts that state into a provider guard. Presence supplies the observed version, while absence lets only a `createIfAbsent` write proceed; edit has no version basis and returns `FS_NOT_FOUND`. A windowed read observes the whole file version, so a later targeted edit is allowed only while that file remains unchanged. State is discarded on plugin disposal and is not persisted across sessions.
 
 ## Single-slot, first-wins