feat(dify): make public URLs individually overridable

[this-is-eis]

Summary

dify.commonEnvs currently derives all public URL env vars from a single dify.baseUrl (global.host / baseUrlOverride), so the chart is effectively single-domain:

{{- range tuple "CONSOLE_API_URL" "CONSOLE_WEB_URL" "SERVICE_API_URL" "APP_API_URL" "APP_WEB_URL" }}
- name: {{ . }}
  value: {{ include "dify.baseUrl" $ }}
{{- end }}

Dify itself supports serving the console, the published WebApp, and the service API on different hostnames. Today the only way to do that with this chart is to fork it or resort to duplicate-env hacks. This PR lets each URL be set independently, while keeping the single-domain default untouched.

fix #171

Changes

• Emit each public URL from its own optional global.* value, defaulting to dify.baseUrl when unset.
• Add three new optional vars that are emitted only when set (Dify's own defaults apply otherwise): FILES_URL, TRIGGER_URL, NEXT_PUBLIC_SOCKET_URL.
• Document the new values in values.yaml (commented, under global:) and README.md.
• Bump chart version 0.9.1 → 0.10.0.

New global.* values

value	env var	default when unset
consoleApiUrl	CONSOLE_API_URL	dify.baseUrl
consoleWebUrl	CONSOLE_WEB_URL	dify.baseUrl
serviceApiUrl	SERVICE_API_URL	dify.baseUrl
appApiUrl	APP_API_URL	dify.baseUrl
appWebUrl	APP_WEB_URL	dify.baseUrl
endpointUrlTemplate	ENDPOINT_URL_TEMPLATE	<baseUrl>/e/{hook_id}
filesUrl	FILES_URL	(not emitted)
triggerUrl	TRIGGER_URL	(not emitted)
nextPublicSocketUrl	NEXT_PUBLIC_SOCKET_URL	(not emitted)

Backward compatibility

100% — with no new values set, the rendered env is byte-identical to the current chart. Verified with helm template: a full render with default values diffs clean against master (aside from the helm.sh/chart version label). The five console/app/service URLs equal baseUrl, ENDPOINT_URL_TEMPLATE equals <baseUrl>/e/{hook_id}, and the three new vars stay absent.

Testing

helm template dify charts/dify                              # matches master when no new values set
helm template dify charts/dify --set global.consoleApiUrl=https://console.example.com \
  --set global.serviceApiUrl=https://api.example.com       # each URL reflects its override; unset ones fall back to baseUrl
helm lint charts/dify                                       # passes