Feat: full optimization on connector dashboard (#14979)

### What problem does this PR solve?

This PR improves the connector dashboard task management experience and
adds better visibility into connector execution logs.

### Overview:

#### Before
<img width="700" alt="image"
src="https://github.com/user-attachments/assets/e4a8ed6f-2e18-4f0f-8528-41a514550052"
/>

#### Now:
<img width="700" alt="Screenshot from 2026-05-18 16-31-30"
src="https://github.com/user-attachments/assets/d4ca193b-847a-49ae-9e4f-5fbca60ea627"
/>

### 1. Add a new logging page to the connector dashboard

A new logging page has been added so users can view connector task
execution logs directly from the connector dashboard.

### 2. Merge the Resume button into Confirm

The separate **Resume** button has been removed. The **Confirm** button
now represents different actions depending on the current task state:

- **Save**: Save form changes and reschedule tasks.
- **Stop**: Cancel currently scheduled or running tasks.
- **Resume**: Create new scheduled tasks after the previous tasks have
been stopped.
- **Start**: Start tasks when no task has been started yet.

### 3. Separate syncing and pruning tasks

Connector tasks are now separated into **syncing** and **pruning**.

Pruning is controlled by the **Sync deleted files** option:

- When **Sync deleted files** is disabled, only syncing tasks are shown.
- When **Sync deleted files** is enabled, both syncing and pruning tasks
are shown.

**Now: Sync deleted files disabled**

<img width="700" alt="Sync deleted files disabled"
src="https://github.com/user-attachments/assets/dbd9232e-614a-407f-a0b1-c109e5fa567d"
/>

**Now: Sync deleted files enabled**

<img width="700" alt="Sync deleted files enabled"
src="https://github.com/user-attachments/assets/1f527f48-ccb3-4ee8-97ca-086891489296"
/>

### 4. Update logs in backend

<img width="700" alt="image"
src="https://github.com/user-attachments/assets/10a95a3f-98c1-4e67-8afa-ddf6cda5b0b2"
/>

### 5. Remove connector resume API

- Removed: `POST /v1/connectors/<connector_id>/resume`
- Replaced by: `PATCH /v1/connectors/<connector_id>`


### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/components/dynamic-form.tsx

@@ -111,10 +111,12 @@ interface DynamicFormProps<T extends FieldValues> {
 // Form ref interface
 export interface DynamicFormRef {
   submit: () => void;
+  isDirty: () => boolean;
   getValues: (name?: string) => any;
   reset: (values?: any) => void;
   trigger: UseFormTrigger<any>;
   watch: (field: string, callback: (value: any) => void) => () => void;
+  watchDirty: (callback: (isDirty: boolean, values: any) => void) => () => void;
   updateFieldType: (fieldName: string, newType: FormFieldType) => void;
   onFieldUpdate: (
     fieldName: string,
@@ -809,6 +811,7 @@ const DynamicForm = {
               onSubmit(filteredValues);
             })();
           },
+          isDirty: () => form.formState.isDirty,
           getValues: form.getValues,
           reset: (values?: T) => {
             if (values) {
@@ -828,6 +831,12 @@ const DynamicForm = {
             });
             return unsubscribe;
           },
+          watchDirty: (callback: (isDirty: boolean, values: any) => void) => {
+            const { unsubscribe } = form.watch((values: any) => {
+              callback(form.formState.isDirty, values);
+            });
+            return unsubscribe;
+          },
 
           onFieldUpdate: (
             fieldName: string,