Phase 02 — Database Schema

Goal

Create all database tables on plugin activation so every other module has a stable storage layer to build against.

src/Install/Installer.php — run() calls dbDelta() with 15 CREATE TABLE statements (15 because the spec’s 14 includes two subscription sub-tables plus the notes table). Stores wplm_db_version, hands off to Migrator on version bump.
src/Install/Migrator.php — Versioned migration stub; hosts per-version upgrade routines.

#	Table	Purpose
1	`wplm_licenses`	License key records (encrypted key, hash, signature, status, seats)
2	`wplm_machines`	Device activations bound to a license
3	`wplm_machine_components`	Sub-fingerprints for hardware components
4	`wplm_activation_log`	Immutable audit log of every licensing event
5	`wplm_generators`	Key-format templates
6	`wplm_api_keys`	Consumer keys for REST API authentication
7	`wplm_releases`	Software version records with changelog and artifact reference
8	`wplm_webhooks`	Webhook registrations (events + target URL + secret)
9	`wplm_webhook_log`	Delivery attempts and responses
10	`wplm_blacklist`	Global fingerprint / IP / email deny list
11	`wplm_license_meta`	Arbitrary key-value meta per license
12	`wplm_subscriptions`	Native subscription records
13	`wplm_subscription_items`	Line items per subscription
14	`wplm_subscription_renewals`	Renewal / switch / resubscribe history
15	`wplm_subscription_notes`	System and admin audit notes per subscription

SHOW TABLES LIKE 'wp_wplm_%';
-- Expect 15 rows

DESCRIBE wp_wplm_licenses;
-- hash column must be CHAR(64) with a UNIQUE KEY

Activate, then deactivate and reactivate — dbDelta should not error on re-run (idempotent).