fix(supervise): remove queue directory from db-backed flow

docs/prds/prd-new-sqlite-local-storage.md

@@ -27,12 +27,10 @@ one-off persistence.
 
 1. Supervise proposals and responses are persisted through SQLite.
 2. Audit entries are persisted through SQLite.
-3. Existing public supervise helpers keep their current call shape where
-   practical: `write_proposal`, `read_proposal`, `list_pending_proposals`,
-   `write_response`, `read_response`, `wait_for_response`,
-   `archive_proposal`, `write_audit_entry`, and `read_audit_entries`.
-4. The sidecar queue mount still works across docker, smolmachines, and
-   macOS-container backends.
+3. Supervise queue helpers use the bottle slug / queue key instead of a queue
+   directory path.
+4. The sidecar receives the host database mount across docker, smolmachines,
+   and macOS-container backends.
 5. The implementation stays stdlib-only.
 6. Unit tests cover queue round-trips, pending discovery, response waits,
    archive semantics, audit round-trips, and path creation.
@@ -57,11 +55,9 @@ Queue and audit state use the host-level local database:
 
 The supervise sidecar receives that database as a writable bind mount at
 `/run/supervise/bot-bottle.db` and gets the path through `SUPERVISE_DB_PATH`.
-The existing per-slug queue directory mount remains in place for compatibility
-with the supervise sidecar contract and any adjacent tooling that still expects a
-queue directory, but the active queue records live in the host database. This
-creates the shared host database that later forge/native lifecycle work can
-extend in separate PRDs.
+No per-slug queue directory is mounted into the sidecar. This creates the shared
+host database that later forge/native lifecycle work can extend in separate
+PRDs.
 
 ### Tables
 
@@ -113,9 +109,8 @@ CREATE TABLE supervise_audit_entries (
 
 ### Compatibility
 
-The existing helper functions keep accepting `Path` arguments for queue
-directories. Internally, they map the queue directory to a queue key and perform
-equivalent operations against `~/.bot-bottle/bot-bottle.db`:
+The queue helpers take a bottle slug / queue key and perform equivalent
+operations against `~/.bot-bottle/bot-bottle.db`:
 
 - `list_pending_proposals` returns non-archived proposals without a non-archived
   response, sorted by arrival time.
@@ -123,9 +118,9 @@ equivalent operations against `~/.bot-bottle/bot-bottle.db`:
   moving files into `processed/`.
 - `wait_for_response` keeps the current polling behavior but polls SQLite.
 
-The old path helpers (`queue_dir_for_slug`, `audit_dir`, `audit_log_path`) stay
-available for compatibility. `audit_log_path` no longer describes the active
-storage location; callers should use `read_audit_entries`.
+The old audit path helpers (`audit_dir`, `audit_log_path`) stay available for
+compatibility. `audit_log_path` no longer describes the active storage location;
+callers should use `read_audit_entries`.
 
 ## Implementation chunks