fix(secrets): align SecretRef inspect/strict behavior across preload/runtime paths (#66818)

* Config: add inspect/strict SecretRef string resolver

* CLI: pass resolved/source config snapshots to plugin preload

* Slack: keep HTTP route registration config-only

* Providers: normalize SecretRef handling for auth and web tools

* Secrets: add Exa web search target to registry and docs

* Telegram: resolve env SecretRef tokens at runtime

* Agents: resolve custom provider env SecretRef ids

* Providers: fail closed on blocked SecretRef fallback

* Telegram: enforce env SecretRef policy for runtime token refs

* Status/Providers/Telegram: tighten SecretRef preload and fallback handling

* Providers: enforce env SecretRef policy checks in fallback auth paths

* fix: add SecretRef lifecycle changelog entry (#66818) (thanks @joshavant)

docs/reference/secretref-user-supplied-credentials-matrix.json

@@ -526,6 +526,13 @@
       "secretShape": "secret_input",
       "optIn": true
     },
+    {
+      "id": "plugins.entries.exa.config.webSearch.apiKey",
+      "configFile": "openclaw.json",
+      "path": "plugins.entries.exa.config.webSearch.apiKey",
+      "secretShape": "secret_input",
+      "optIn": true
+    },
     {
       "id": "plugins.entries.firecrawl.config.webSearch.apiKey",
       "configFile": "openclaw.json",