feat: Add comprehensive database schema migrations for all platform tables

- Add subscribers table with IMSI, MSISDN, authentication keys, and eSIM profile fields
- Add service_plans table for data/voice/SMS limits and QoS parameters (ARPA, AMBR)
- Add sessions table for tracking PDU sessions with QoS and usage metrics
- Add usage_records table for billing and charging data
- Add users table with role-based access control fields
- Add roles, permissions, and role_permissions junction table for RBAC
- Add auth

migrations/00010_init_plugins.sql

@@ -0,0 +1,30 @@
+-- +goose Up
+-- Create plugins table
+CREATE TABLE IF NOT EXISTS plugins (
+    id          SERIAL PRIMARY KEY,
+    name        TEXT NOT NULL UNIQUE,
+    version     TEXT NOT NULL,
+    description TEXT,
+    author      TEXT,
+    type        TEXT,
+    category    TEXT,
+    license     TEXT,
+    homepage    TEXT,
+    repository  TEXT,
+    enabled     BOOLEAN NOT NULL DEFAULT false,
+    status      TEXT NOT NULL DEFAULT 'installed',
+    config      JSONB,
+    installed_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    deleted_at  TIMESTAMPTZ
+);
+
+-- Create indexes
+CREATE INDEX IF NOT EXISTS idx_plugins_name ON plugins(name);
+CREATE INDEX IF NOT EXISTS idx_plugins_enabled ON plugins(enabled);
+CREATE INDEX IF NOT EXISTS idx_plugins_deleted_at ON plugins(deleted_at);
+
+-- +goose Down
+-- Drop plugins table
+DROP TABLE IF EXISTS plugins CASCADE;