feat: reworked command processing and storage

sparse-server/migrations/20250223184639_beacon_version.sql

@@ -0,0 +1,3 @@
+-- Add migration script here
+
+ALTER TABLE beacon_instance ADD COLUMN version int NOT NULL DEFAULT 512;

sparse-server/migrations/20250223215600_commands_v2.sql

@@ -0,0 +1,27 @@
+-- Add migration script here
+DROP TABLE beacon_command_invocation;
+DROP TABLE beacon_command;
+
+CREATE TABLE beacon_command (
+    command_id integer PRIMARY KEY AUTOINCREMENT NOT NULL,
+
+    cmd_parameters varchar NOT NULL
+);
+
+CREATE TABLE beacon_command_invocation (
+    beacon_id varchar NOT NULL,
+    command_id int NOT NULL,
+
+    issue_date int NOT NULL,
+
+    invoker_id int NOT NULL,
+
+    invocation_date int,
+    invocation_result varchar,
+
+    PRIMARY KEY (beacon_id, command_id),
+
+    FOREIGN KEY (command_id) REFERENCES beacon_command,
+    FOREIGN KEY (beacon_id) REFERENCES beacon_instance,
+    FOREIGN KEY (invoker_id) REFERENCES users
+);