feat(stats-db): add Sentry error reporting for database failures

Stats DB initialization failures were only logged locally, providing no
visibility into production issues. This change adds Sentry reporting for:

- Database corruption detection (integrity check failures)
- Native module loading failures (architecture mismatches)
- Database creation failures
- General initialization failures

Created reusable Sentry utilities in src/main/utils/sentry.ts that
lazily load @sentry/electron to avoid module initialization issues.

src/main/stats-db.ts

@@ -39,6 +39,7 @@ import * as path from 'path';
 import * as fs from 'fs';
 import { app } from 'electron';
 import { logger } from './utils/logger';
+import { captureException, captureMessage } from './utils/sentry';
 import {
 	QueryEvent,
 	AutoRunSession,
@@ -414,6 +415,13 @@ export class StatsDB {
 					// This can happen if the native module fails to load
 					const errorMessage = createError instanceof Error ? createError.message : String(createError);
 					logger.error(`Failed to create database: ${errorMessage}`, LOG_CONTEXT);
+
+					// Report to Sentry
+					void captureException(createError, {
+						context: 'initialize:createNewDatabase',
+						dbPath: this.dbPath,
+					});
+
 					return {
 						success: false,
 						wasReset: false,
@@ -451,6 +459,14 @@ export class StatsDB {
 		} catch (error) {
 			const errorMessage = error instanceof Error ? error.message : String(error);
 			logger.error(`Failed to initialize stats database: ${errorMessage}`, LOG_CONTEXT);
+
+			// Report to Sentry
+			void captureException(error, {
+				context: 'initialize:outerCatch',
+				dbPath: this.dbPath,
+				wasReset,
+			});
+
 			return {
 				success: false,
 				wasReset,
@@ -1105,6 +1121,12 @@ export class StatsDB {
 			const errors = result.map((row) => row.integrity_check);
 			logger.error(`Database integrity check failed: ${errors.join(', ')}`, LOG_CONTEXT);
 
+			// Report corruption to Sentry for monitoring
+			void captureMessage('Stats database corruption detected', 'error', {
+				integrityErrors: errors,
+				dbPath: this.dbPath,
+			});
+
 			// Close before recovery
 			db.close();
 		} catch (error) {
@@ -1112,6 +1134,14 @@ export class StatsDB {
 			const errorMessage = error instanceof Error ? error.message : String(error);
 			logger.error(`Failed to open database: ${errorMessage}`, LOG_CONTEXT);
 
+			// Report failure to Sentry
+			void captureException(error, {
+				context: 'openWithCorruptionHandling',
+				dbPath: this.dbPath,
+				isNativeModuleError:
+					errorMessage.includes('dlopen') || errorMessage.includes('better_sqlite3.node'),
+			});
+
 			// Check if this is a native module loading issue (not recoverable by reset)
 			if (errorMessage.includes('dlopen') || errorMessage.includes('better_sqlite3.node')) {
 				logger.error('Native SQLite module failed to load - cannot recover', LOG_CONTEXT);

src/main/utils/sentry.ts

@@ -0,0 +1,74 @@
+/**
+ * Sentry utilities for error reporting in the main process.
+ *
+ * These utilities lazily load Sentry to avoid module initialization issues
+ * that can occur when importing @sentry/electron/main before app.whenReady().
+ */
+
+import { logger } from './logger';
+
+/** Sentry severity levels */
+export type SentrySeverityLevel = 'fatal' | 'error' | 'warning' | 'log' | 'info' | 'debug';
+
+/** Sentry module type for crash reporting */
+interface SentryModule {
+	captureMessage: (
+		message: string,
+		captureContext?: { level?: SentrySeverityLevel; extra?: Record<string, unknown> }
+	) => string;
+	captureException: (
+		exception: Error | unknown,
+		captureContext?: { level?: SentrySeverityLevel; extra?: Record<string, unknown> }
+	) => string;
+}
+
+/** Cached Sentry module reference */
+let sentryModule: SentryModule | null = null;
+
+/**
+ * Reports an exception to Sentry from the main process.
+ * Lazily loads Sentry to avoid module initialization issues.
+ *
+ * @param error - The error to report
+ * @param extra - Additional context data
+ */
+export async function captureException(
+	error: Error | unknown,
+	extra?: Record<string, unknown>
+): Promise<void> {
+	try {
+		if (!sentryModule) {
+			const sentry = await import('@sentry/electron/main');
+			sentryModule = sentry;
+		}
+		sentryModule.captureException(error, { extra });
+	} catch {
+		// Sentry not available (development mode or initialization failed)
+		logger.debug('Sentry not available for exception reporting', '[Sentry]');
+	}
+}
+
+/**
+ * Reports a message to Sentry from the main process.
+ * Lazily loads Sentry to avoid module initialization issues.
+ *
+ * @param message - The message to report
+ * @param level - Severity level
+ * @param extra - Additional context data
+ */
+export async function captureMessage(
+	message: string,
+	level: SentrySeverityLevel = 'error',
+	extra?: Record<string, unknown>
+): Promise<void> {
+	try {
+		if (!sentryModule) {
+			const sentry = await import('@sentry/electron/main');
+			sentryModule = sentry;
+		}
+		sentryModule.captureMessage(message, { level, extra });
+	} catch {
+		// Sentry not available (development mode or initialization failed)
+		logger.debug('Sentry not available for message reporting', '[Sentry]');
+	}
+}