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>

contrib/helm/charts/probo/templates/deployment.yaml

@@ -233,10 +233,6 @@ spec:
               value: {{ .Values.probo.openai.maxTokens | quote }}
             {{- end }}
             # Firecrawl Integration
-            {{- if .Values.probo.firecrawl.endpoint }}
-            - name: FIRECRAWL_ENDPOINT
-              value: {{ .Values.probo.firecrawl.endpoint | quote }}
-            {{- end }}
             {{- if .Values.probo.firecrawl.apiKey }}
             - name: FIRECRAWL_API_KEY
               valueFrom:

contrib/helm/charts/probo/values-production.yaml.example

@@ -161,7 +161,6 @@ probo:
 
   # Firecrawl web search (optional, used by tracker mapping agent)
   # firecrawl:
-  #   endpoint: "https://api.firecrawl.dev/v2"
   #   apiKey: "CHANGE_ME_FIRECRAWL_API_KEY"
 
   # Tracker mapping agent (optional, auto-links tracker patterns to vendors)

contrib/helm/charts/probo/values.yaml

@@ -259,7 +259,6 @@ probo:
 
   # Firecrawl web search integration (optional, used by tracker mapping agent)
   firecrawl:
-    endpoint: ""
     apiKey: ""
 
   # Tracker mapping agent (optional, requires openai.apiKey or anthropic key)