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/vetting/assessment.go

@@ -71,13 +71,12 @@ var (
 
 type (
 	Config struct {
-		Client            *llm.Client
-		Model             string
-		MaxTokens         int
-		ChromeAddr        string
-		FirecrawlEndpoint string
-		FirecrawlAPIKey   string
-		Logger            *log.Logger
+		Client          *llm.Client
+		Model           string
+		MaxTokens       int
+		ChromeAddr      string
+		FirecrawlAPIKey string
+		Logger          *log.Logger
 	}
 
 	Assessor struct {
@@ -210,7 +209,6 @@ func (a *Assessor) Assess(ctx context.Context, websiteURL string, procedure stri
 		a.cfg.Logger,
 		thirdPartyBrowser,
 		researchBrowser,
-		a.cfg.FirecrawlEndpoint,
 		a.cfg.FirecrawlAPIKey,
 		reporter,
 	)