Hardcode Firecrawl API endpoint, drop FIRECRAWL_ENDPOINT config

Firecrawl has a single public API at https://api.firecrawl.dev/v2.
The endpoint was configurable but never varied across environments,
so hardcode it as a package-level const and remove the Endpoint
field from FirecrawlConfig and all downstream wiring (bootstrap,
Helm chart, probod, vetting, cookiebanner).

Signed-off-by: Émile Ré <emile@probo.com>

pkg/agent/tools/search/government_db.go

@@ -43,7 +43,7 @@ type (
 	}
 )
 
-func CheckGovernmentDBTool(endpoint, apiKey string) agent.Tool {
+func CheckGovernmentDBTool(apiKey string) agent.Tool {
 	client := newHTTPClient()
 
 	return agent.FunctionTool(
@@ -87,7 +87,7 @@ func CheckGovernmentDBTool(endpoint, apiKey string) agent.Tool {
 			}
 
 			for _, s := range searches {
-				entries, err := firecrawlSearch(ctx, client, endpoint, apiKey, s.query, 3)
+				entries, err := firecrawlSearch(ctx, client, apiKey, s.query, 3)
 				if err != nil {
 					continue
 				}