Implement fiscal-style research MVP flows

drizzle/0006_coverage_journal_tracking.sql

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+ALTER TABLE `watchlist_item` ADD `status` text NOT NULL DEFAULT 'backlog';
+--> statement-breakpoint
+ALTER TABLE `watchlist_item` ADD `priority` text NOT NULL DEFAULT 'medium';
+--> statement-breakpoint
+ALTER TABLE `watchlist_item` ADD `updated_at` text NOT NULL DEFAULT '';
+--> statement-breakpoint
+UPDATE `watchlist_item`
+SET `status` = 'backlog'
+WHERE `status` IS NULL OR TRIM(`status`) = '';
+--> statement-breakpoint
+UPDATE `watchlist_item`
+SET `priority` = 'medium'
+WHERE `priority` IS NULL OR TRIM(`priority`) = '';
+--> statement-breakpoint
+UPDATE `watchlist_item`
+SET `updated_at` = COALESCE(NULLIF(`created_at`, ''), CURRENT_TIMESTAMP)
+WHERE `updated_at` IS NULL OR TRIM(`updated_at`) = '';
+--> statement-breakpoint
+ALTER TABLE `watchlist_item` ADD `last_reviewed_at` text;
+--> statement-breakpoint
+ALTER TABLE `holding` ADD `company_name` text;
+--> statement-breakpoint
+CREATE INDEX `watchlist_user_updated_idx` ON `watchlist_item` (`user_id`, `updated_at`);
+--> statement-breakpoint
+CREATE TABLE `research_journal_entry` (
+  `id` integer PRIMARY KEY AUTOINCREMENT NOT NULL,
+  `user_id` text NOT NULL,
+  `ticker` text NOT NULL,
+  `accession_number` text,
+  `entry_type` text NOT NULL,
+  `title` text,
+  `body_markdown` text NOT NULL,
+  `metadata` text,
+  `created_at` text NOT NULL,
+  `updated_at` text NOT NULL,
+  FOREIGN KEY (`user_id`) REFERENCES `user`(`id`) ON UPDATE no action ON DELETE cascade
+);
+--> statement-breakpoint
+CREATE INDEX `research_journal_ticker_idx` ON `research_journal_entry` (`user_id`, `ticker`, `created_at`);
+--> statement-breakpoint
+CREATE INDEX `research_journal_accession_idx` ON `research_journal_entry` (`user_id`, `accession_number`);