Add activity push notifications and registration patches

app/feature_schema.py

@@ -1,4 +1,4 @@
-"""Startup equivalents of migrations 19 and 20 (kept in sync by tests)."""
+"""Startup equivalents of migrations 19–22 (kept in sync by tests)."""
 
 FEATURE_SCHEMA = (
     '''CREATE TABLE IF NOT EXISTS push_devices (
@@ -27,4 +27,32 @@ FEATURE_SCHEMA = (
     );
     CREATE INDEX IF NOT EXISTS idx_bug_report_submissions_user
         ON bug_report_submissions(user_id, submitted_at);''',
+    '''CREATE TABLE IF NOT EXISTS notification_preferences (
+        user_id INTEGER PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+        language VARCHAR(2) NOT NULL DEFAULT 'de' CHECK (language IN ('de', 'en')),
+        friend_request BOOLEAN NOT NULL DEFAULT TRUE,
+        direct_message BOOLEAN NOT NULL DEFAULT TRUE,
+        event_invitation BOOLEAN NOT NULL DEFAULT TRUE
+    );
+    CREATE TABLE IF NOT EXISTS push_notifications (
+        id UUID PRIMARY KEY,
+        device_id BIGINT NOT NULL REFERENCES push_devices(id) ON DELETE CASCADE,
+        session_id INTEGER NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
+        recipient_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+        actor_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+        kind VARCHAR(32) NOT NULL CHECK (kind IN ('friend_request', 'direct_message', 'event_invitation')),
+        object_id BIGINT NOT NULL,
+        event_key TEXT NOT NULL,
+        token_hash VARCHAR(64) NOT NULL,
+        state VARCHAR(16) NOT NULL DEFAULT 'pending' CHECK (state IN ('pending', 'sent', 'dropped', 'failed')),
+        attempts SMALLINT NOT NULL DEFAULT 0,
+        created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        expires_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP + INTERVAL '1 hour',
+        available_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        UNIQUE(device_id, event_key)
+    );
+    CREATE INDEX IF NOT EXISTS idx_push_notifications_pending
+        ON push_notifications(available_at) WHERE state='pending';''',
+    '''CREATE UNIQUE INDEX IF NOT EXISTS idx_user_badges_registration_cohort
+        ON user_badges(user_id) WHERE badge_code IN ('alpha_tester', 'beta_tester', 'early_bird');''',
 )