Sync project files

DOCUMENTATION/ADDING_KEYS.md

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+Adding keys is easy.
+
+For example:
+
+```bash
+node add-key.mjs standard 500 name
+node add-key.mjs partner 1000 name
+node add-key.mjs public 10 name
+````
+
+It generates a random 32-character hex key, prefixes it based on the type (`pk_` for partner, `pub_` for public, `sk_` for everything else to match the existing naming pattern), inserts it as an active key, and prints the generated key once so you can copy it.
+
+You can also manage keys through `db.json`:
+
+```bash
+node export-db.mjs
+```
+
+Export the current SQLite database into `db.json`, edit the file manually, then apply changes with:
+
+```bash
+node update-db.mjs
+```
+
+Run the scripts directly on the VPS, or work locally with a copy of the database and sync the changes afterward.