Add vault stats command and API endpoint

docs/advanced_cli.md

@@ -73,6 +73,7 @@ Manage the entire vault for a profile.
 | Import a vault | `vault import` | `seedpass vault import --file backup.json` |
 | Change the master password | `vault change-password` | `seedpass vault change-password` |
 | Lock the vault | `vault lock` | `seedpass vault lock` |
+| Show profile statistics | `vault stats` | `seedpass vault stats` |
 
 ### Nostr Commands
 
@@ -159,6 +160,7 @@ Code: 123456
 - **`seedpass vault import`** – Import a vault from an encrypted JSON file.
 - **`seedpass vault change-password`** – Change the master password used for encryption.
 - **`seedpass vault lock`** – Clear sensitive data from memory and require reauthentication.
+- **`seedpass vault stats`** – Display statistics about the active seed profile.
 
 ### `nostr` Commands
 

docs/api_reference.md

@@ -29,6 +29,7 @@ Keep this token secret. Every request must include it in the `Authorization` hea
 - `POST /api/v1/fingerprint/select` – Switch the active fingerprint.
 - `GET /api/v1/totp/export` – Export all TOTP entries as JSON.
 - `GET /api/v1/totp` – Return current TOTP codes and remaining time.
+- `GET /api/v1/stats` – Return statistics about the active seed profile.
 - `GET /api/v1/parent-seed` – Reveal the parent seed or save it with `?file=`.
 - `GET /api/v1/nostr/pubkey` – Fetch the Nostr public key for the active seed.
 - `POST /api/v1/checksum/verify` – Verify the checksum of the running script.