feat: SQLite database for all credentials, keys, wake schedule, and usage cache

- Add SQLite database at ~/.local/share/dispatch/dispatch.db with tables: credentials, api_keys, wake_schedule, usage_cache
- Store Claude OAuth credentials in DB with import button in Model Status UI
- Store OpenCode/Copilot API keys in DB with paste-to-import modal
- Store OpenCode cookie and workspace IDs in DB
- Migrate wake schedule from .wake-schedule.json to DB
- Migrate usage cache from in-memory Map + localStorage to DB
- Remove all env var and file fallbacks — DB is the single source of truth
- Add seed scripts: bin/import-credentials.ts, bin/seed-opencode-keys.ts
- Docker: container runs as host UID/GID with matching home directory
- Clean up dispatch.toml: remove env fields, update comments
- Progress bar time markers for usage cycle tracking

1 files changed, 3 insertions, 0 deletions

diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index ae826dc..90cafbe 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -29,3 +29,6 @@ export { ModelRegistry, ModelResolver } from "./models/index.js";
 
 // Credentials
 export * from "./credentials/index.js";
+
+// Database
+export { getDatabase, closeDatabase, getDatabasePath } from "./db/index.js";