docs(prd): add sqlite local storage plan

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

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+# PRD prd-new: SQLite local storage
+
+- **Status:** Draft
+- **Author:** codex
+- **Created:** 2026-07-01
+- **Issue:** #319
+
+## Summary
+
+Add a small stdlib SQLite storage layer for bot-bottle host runtime state,
+starting with the supervise queue and audit log. This replaces scattered JSON
+queue files and JSONL audit logs with structured tables while preserving the
+existing public supervise helper functions and sidecar queue mount contract.
+
+## Problem
+
+Bot-bottle currently stores supervise proposals and responses as individual JSON
+files under `~/.bot-bottle/queue/<slug>/`, and audit entries as JSONL files
+under `~/.bot-bottle/audit/`. That worked for the original interactive TUI, but
+new forge-native orchestration needs durable, queryable local state for queues,
+audit trails, watchdogs, and lifecycle records. PR #318 started introducing
+SQLite-shaped boilerplate for forge state; the storage foundation should live in
+its own PR so forge work can build on the shared runtime store instead of adding
+one-off persistence.
+
+## Goals / Success Criteria
+
+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.
+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.
+
+## Non-goals
+
+- Migrating old JSON queue files or JSONL audit logs.
+- Adding forge orchestration state tables.
+- Adding egress metering or budget tables.
+- Changing the supervise TUI workflow or remediation behavior.
+- Introducing a third-party ORM or migration framework.
+
+## Design
+
+### Database locations
+
+Queue state remains tied to the mounted per-bottle queue directory:
+
+```text
+~/.bot-bottle/queue/<slug>/supervise.db
+```
+
+The supervise sidecar already receives that directory at
+`/run/supervise/queue`, so both the sidecar and host TUI can read and write the
+same SQLite file without changing backend mounts.
+
+Audit state uses the host-level local database:
+
+```text
+~/.bot-bottle/bot-bottle.db
+```
+
+This creates the shared host database that later forge/native lifecycle work can
+extend in separate PRDs.
+
+### Tables
+
+`supervise_proposals` lives in the per-queue database:
+
+```sql
+CREATE TABLE supervise_proposals (
+    id TEXT PRIMARY KEY,
+    bottle_slug TEXT NOT NULL,
+    tool TEXT NOT NULL,
+    proposed_file TEXT NOT NULL,
+    justification TEXT NOT NULL,
+    arrival_timestamp TEXT NOT NULL,
+    current_file_hash TEXT NOT NULL,
+    archived INTEGER NOT NULL DEFAULT 0
+);
+```
+
+`supervise_responses` lives in the same per-queue database:
+
+```sql
+CREATE TABLE supervise_responses (
+    proposal_id TEXT PRIMARY KEY,
+    status TEXT NOT NULL,
+    notes TEXT NOT NULL,
+    final_file TEXT,
+    archived INTEGER NOT NULL DEFAULT 0
+);
+```
+
+`supervise_audit_entries` lives in the host database:
+
+```sql
+CREATE TABLE supervise_audit_entries (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    timestamp TEXT NOT NULL,
+    bottle_slug TEXT NOT NULL,
+    component TEXT NOT NULL,
+    operator_action TEXT NOT NULL,
+    operator_notes TEXT NOT NULL,
+    justification TEXT NOT NULL,
+    diff TEXT NOT NULL
+);
+```
+
+### Compatibility
+
+The existing helper functions keep accepting `Path` arguments for queue
+directories. Internally, they map the queue directory to `supervise.db` and
+perform equivalent operations:
+
+- `list_pending_proposals` returns non-archived proposals without a non-archived
+  response, sorted by arrival time.
+- `archive_proposal` marks matching proposal/response rows archived instead of
+  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`.
+
+## Implementation chunks
+
+1. Add SQLite store helpers for supervise queue and audit state.
+2. Rewire `bot_bottle.supervise` queue/audit functions to the store.
+3. Update supervise CLI discovery tests and queue/audit unit tests.
+4. Run unit tests, pyright, and pylint for touched modules.
+
+## Open questions
+
+None.