refactor: remove legacy scheduling and analytics code

- Deleted the scheduler module and its associated functions, transitioning to OS-level scheduling.
- Removed the Analytics module and its related interfaces, retaining only a placeholder for backward compatibility.
- Updated ConfigValidator to warn about legacy schedule and analytics configurations.
- Cleaned up StartupValidator to remove diagnostics and schedule validation logic.
- Adjusted Load.ts to handle legacy flags for diagnostics and analytics.
- Removed unused diagnostics capturing functionality.

src/config.jsonc

@@ -23,14 +23,6 @@
         "clusters": 1,
         "passesPerRun": 1
     },
-    "schedule": {
-        "enabled": false,
-        "useAmPm": false,
-        "time12": "9:00 AM",
-        "time24": "09:00",
-        "timeZone": "Europe/Paris",
-        "runImmediatelyOnStart": true
-    },
     "jobState": {
         "enabled": true,
         "dir": ""
@@ -126,7 +118,7 @@
         "authToken": ""
     },
 
-    // Logging & diagnostics
+    // Logging
     "logging": {
         "excludeFunc": [
             "SEARCH-CLOSE-TABS",
@@ -140,19 +132,6 @@
         ],
         "redactEmails": true
     },
-    "diagnostics": {
-        "enabled": true,
-        "saveScreenshot": true,
-        "saveHtml": true,
-        "maxPerRun": 2,
-        "retentionDays": 7
-    },
-    "analytics": {
-        "enabled": true,
-        "retentionDays": 30,
-        "exportMarkdown": true,
-        "webhookSummary": true
-    },
 
     // Buy mode
     "buyMode": {