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/00009_init_auth_sessions_api_keys.sql

@@ -0,0 +1,40 @@
+-- +goose Up
+-- Create auth_sessions table
+CREATE TABLE IF NOT EXISTS auth_sessions (
+    id            TEXT PRIMARY KEY,
+    user_id       INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    token         TEXT NOT NULL,
+    refresh_token TEXT NOT NULL,
+    expires_at    TIMESTAMPTZ NOT NULL,
+    ip_address    TEXT,
+    user_agent    TEXT,
+    is_active     BOOLEAN NOT NULL DEFAULT true,
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Create api_keys table
+CREATE TABLE IF NOT EXISTS api_keys (
+    id          SERIAL PRIMARY KEY,
+    name        TEXT NOT NULL,
+    key         TEXT NOT NULL UNIQUE,
+    secret      TEXT NOT NULL,
+    permissions JSONB,
+    is_active   BOOLEAN NOT NULL DEFAULT true,
+    expires_at  TIMESTAMPTZ,
+    last_used   TIMESTAMPTZ,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Create indexes
+CREATE INDEX IF NOT EXISTS idx_auth_sessions_user_id ON auth_sessions(user_id);
+CREATE INDEX IF NOT EXISTS idx_auth_sessions_token ON auth_sessions(token);
+CREATE INDEX IF NOT EXISTS idx_auth_sessions_expires_at ON auth_sessions(expires_at);
+CREATE INDEX IF NOT EXISTS idx_api_keys_key ON api_keys(key);
+CREATE INDEX IF NOT EXISTS idx_api_keys_is_active ON api_keys(is_active);
+
+-- +goose Down
+-- Drop auth_sessions and api_keys tables
+DROP TABLE IF EXISTS auth_sessions CASCADE;
+DROP TABLE IF EXISTS api_keys CASCADE;