feat: filter for remote jobs only across Canada

Add remote_only config option that appends LinkedIn's f_WT=2 filter
param to search URLs. Change location from Toronto to Canada for
broader remote job coverage.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

daemon.py

@@ -83,6 +83,7 @@ class LinkedInJobScraper:
         seen_links = set()
         encoded_keyword = quote(keyword)
         encoded_location = quote(location)
+        remote_only = self.config.get("remote_only", False)
         delay_range = self.config.get("delay_between_pages", [3, 6])
 
         for page in range(pages):
@@ -93,6 +94,8 @@ class LinkedInJobScraper:
                 f"keywords={encoded_keyword}&location={encoded_location}"
                 f"&start={start_index}"
             )
+            if remote_only:
+                url += "&f_WT=2"
 
             try:
                 response = self.session.get(url, timeout=15)