Add configurable beta test plans and staged rollout

src/lib/server/db/schema.sql

@@ -129,6 +129,54 @@ CREATE TABLE IF NOT EXISTS beta_servers (
 );
 CREATE INDEX IF NOT EXISTS idx_beta_servers_stage ON beta_servers(stage);
 
+-- Immutable test configuration, durable attempts and append-only evidence.
+-- Keeping test outcome separate preserves artifact holds until explicit closure.
+CREATE TABLE IF NOT EXISTS beta_test_plans (
+    beta_id INTEGER PRIMARY KEY REFERENCES betas(id) ON DELETE CASCADE,
+    plan TEXT NOT NULL,
+    outcome TEXT NOT NULL DEFAULT 'active',
+    reason TEXT
+);
+CREATE TABLE IF NOT EXISTS beta_test_runs (
+    id TEXT PRIMARY KEY,
+    beta_id INTEGER NOT NULL REFERENCES betas(id) ON DELETE CASCADE,
+    server TEXT NOT NULL REFERENCES servers(name),
+    phase INTEGER NOT NULL DEFAULT 0,
+    created_at TEXT NOT NULL,
+    observing_at TEXT,
+    retired_at TEXT,
+    metrics TEXT NOT NULL DEFAULT '{}',
+    cursors TEXT NOT NULL DEFAULT '{}'
+);
+CREATE TABLE IF NOT EXISTS beta_test_coverage (
+    beta_id INTEGER NOT NULL REFERENCES betas(id) ON DELETE CASCADE,
+    server TEXT NOT NULL,
+    game TEXT,
+    map TEXT,
+    PRIMARY KEY (beta_id, server)
+);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_beta_test_current_run ON beta_test_runs(beta_id, server) WHERE retired_at IS NULL;
+CREATE TABLE IF NOT EXISTS beta_test_evidence (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    run_id TEXT NOT NULL REFERENCES beta_test_runs(id) ON DELETE CASCADE,
+    event_id TEXT NOT NULL,
+    received_at TEXT NOT NULL,
+    kind TEXT NOT NULL,
+    payload TEXT NOT NULL,
+    UNIQUE(run_id, event_id)
+);
+CREATE INDEX IF NOT EXISTS idx_beta_evidence_run ON beta_test_evidence(run_id, id);
+CREATE TABLE IF NOT EXISTS beta_file_changes (
+    beta_id INTEGER NOT NULL REFERENCES betas(id) ON DELETE CASCADE,
+    server TEXT NOT NULL,
+    rel_path TEXT NOT NULL,
+    PRIMARY KEY (beta_id, server, rel_path)
+);
+CREATE TABLE IF NOT EXISTS beta_test_presets (
+    name TEXT PRIMARY KEY,
+    plan TEXT NOT NULL
+);
+
 -- Many-to-many: which scripts (and pinned versions) are bundled into a beta.
 -- Replaces the deprecated betas.script_id / betas.script_version_id columns.
 CREATE TABLE IF NOT EXISTS beta_scripts (