feat: add chat debug log tables, queries, and SDK types (#23913)

coderd/database/queries/siteconfig.sql

@@ -179,6 +179,31 @@ SET value = CASE
 END
 WHERE site_configs.key = 'agents_desktop_enabled';
 
+-- GetChatDebugLoggingAllowUsers returns the runtime admin setting that
+-- allows users to opt into chat debug logging when the deployment does
+-- not already force debug logging on globally.
+-- name: GetChatDebugLoggingAllowUsers :one
+SELECT
+	COALESCE((SELECT value = 'true' FROM site_configs WHERE key = 'agents_chat_debug_logging_allow_users'), false) :: boolean AS allow_users;
+
+-- UpsertChatDebugLoggingAllowUsers updates the runtime admin setting that
+-- allows users to opt into chat debug logging.
+-- name: UpsertChatDebugLoggingAllowUsers :exec
+INSERT INTO site_configs (key, value)
+VALUES (
+    'agents_chat_debug_logging_allow_users',
+    CASE
+        WHEN sqlc.arg(allow_users)::bool THEN 'true'
+        ELSE 'false'
+    END
+)
+ON CONFLICT (key) DO UPDATE
+SET value = CASE
+    WHEN sqlc.arg(allow_users)::bool THEN 'true'
+    ELSE 'false'
+END
+WHERE site_configs.key = 'agents_chat_debug_logging_allow_users';
+
 -- GetChatTemplateAllowlist returns the JSON-encoded template allowlist.
 -- Returns an empty string when no allowlist has been configured (all templates allowed).
 -- name: GetChatTemplateAllowlist :one