chore: commit previously untracked runtime files (splits, auth, participants, shared)

prisma/migrations/0003_owner_segregation/migration.sql

@@ -0,0 +1,17 @@
+-- Add email to participants for OAuth identity mapping
+ALTER TABLE participants ADD COLUMN IF NOT EXISTS email TEXT UNIQUE;
+
+-- Add owner_id and account_holder_name to statements
+ALTER TABLE statements ADD COLUMN IF NOT EXISTS owner_id INTEGER NOT NULL DEFAULT 1 REFERENCES participants(id);
+ALTER TABLE statements ADD COLUMN IF NOT EXISTS account_holder_name TEXT;
+CREATE INDEX IF NOT EXISTS idx_statements_owner_id ON statements(owner_id);
+
+-- Auto-assignment mapping table: (bank_name, account_number) -> owner
+CREATE TABLE IF NOT EXISTS account_owner_mappings (
+  id SERIAL PRIMARY KEY,
+  bank_name TEXT NOT NULL,
+  account_number TEXT NOT NULL,
+  owner_id INTEGER NOT NULL REFERENCES participants(id),
+  created_at TIMESTAMPTZ DEFAULT NOW(),
+  UNIQUE(bank_name, account_number)
+);