monitoring(error-handler, file-upload): add debug logging for initialization and file operations

Add structured debug-level logging to improve observability:

- SentryInitEffect: Log Sentry initialization steps (start, completion, user context changes)
  to help diagnose issues with Sentry configuration or user context setup. Logs include DSN
  suffix for correlation without exposing full secrets.

- FileUploadProvider: Log file upload lifecycle events (user cancellation, file selection count,
  upload errors) to provide better visibility into file upload behavior. Distinguishes between
  user-initiated cancellation and error scenarios.

These debug logs are visible in development environments and test environments where debugging
is needed, while being filtered in production to reduce noise.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

packages/twenty-front/src/modules/error-handler/components/SentryInitEffect.tsx

@@ -29,6 +29,12 @@ export const SentryInitEffect = () => {
         setIsSentryInitializing(true);
 
         try {
+          // oxlint-disable-next-line no-console
+          console.debug(
+            'Initializing Sentry with DSN ending in:',
+            sentryConfig?.dsn?.slice(-8),
+          );
+
           const {
             init,
             browserTracingIntegration,
@@ -59,6 +65,8 @@ export const SentryInitEffect = () => {
             ],
           });
 
+          // oxlint-disable-next-line no-console
+          console.debug('Sentry initialized successfully');
           setIsSentryInitialized(true);
         } catch (error) {
           // oxlint-disable-next-line no-console
@@ -76,6 +84,12 @@ export const SentryInitEffect = () => {
         !isSentryUserDefined
       ) {
         try {
+          // oxlint-disable-next-line no-console
+          console.debug(
+            'Setting Sentry user context for user:',
+            currentUser?.id,
+          );
+
           const { setUser } = await import('@sentry/react');
           setUser({
             email: currentUser?.email,
@@ -83,6 +97,7 @@ export const SentryInitEffect = () => {
             workspaceId: currentWorkspace?.id,
             workspaceMemberId: currentWorkspaceMember?.id,
           });
+
           setIsSentryUserDefined(true);
         } catch (error) {
           // oxlint-disable-next-line no-console
@@ -90,6 +105,9 @@ export const SentryInitEffect = () => {
         }
       } else if (!isDefined(currentUser) && isSentryInitialized) {
         try {
+          // oxlint-disable-next-line no-console
+          console.debug('Clearing Sentry user context');
+
           const { setUser } = await import('@sentry/react');
           setUser(null);
         } catch (error) {

packages/twenty-front/src/modules/file-upload/components/FileUploadProvider.tsx

@@ -39,11 +39,21 @@ export const FileUploadProvider = ({
 
       try {
         if (!isDefined(files) || files.length === 0) {
+          // oxlint-disable-next-line no-console
+          console.debug('File upload cancelled by user');
           currentOptions.onCancel?.();
         } else {
           const filesArray = Array.from(files);
+          // oxlint-disable-next-line no-console
+          console.debug(
+            `File upload started: ${filesArray.length} file(s) selected`,
+          );
           await currentOptions.onUpload(filesArray);
         }
+      } catch (error) {
+        // oxlint-disable-next-line no-console
+        console.error('File upload error:', error);
+        throw error;
       } finally {
         if (isDefined(fileInputRef.current)) {
           fileInputRef.current.value = '';
@@ -62,7 +72,12 @@ export const FileUploadProvider = ({
     }
 
     try {
+      // oxlint-disable-next-line no-console
+      console.debug('File upload dialog cancelled');
       currentOptions.onCancel?.();
+    } catch (error) {
+      // oxlint-disable-next-line no-console
+      console.error('Error handling file upload cancel:', error);
     } finally {
       if (isDefined(fileInputRef.current)) {
         fileInputRef.current.value = '';