PCD269: bump wp-proud-search-elastic to 2026.06.01.1513 (stage 2)

Picks up the Basic-auth plumbing committed in wp-proud-search-elastic
86fe08f. The plugin reads EP_HELPER_USER/EP_HELPER_PASS constants and
sends Authorization: Basic on docsapi requests when both are defined.

Image built from this commit is still no-op for production: env vars
(ELASTICSEARCH_DOCS_USER/_PASS) are not yet provisioned, so the
constants remain undefined and no auth header is sent. Provisioning
happens at Step E of the rollout plan in the PCD269 dev notes.

Refs PCD269.

Author: curtismchale

composer.json

@@ -546,7 +546,7 @@
         "proudcity/wp-proud-core": "2026.05.28.1213",
         "proudcity/wp-proud-agency": "2026.02.02.1542",
         "proudcity/wp-proud-search": "2025.10.30.1256",
-        "proudcity/wp-proud-search-elastic": "2026.05.04.1644",
+        "proudcity/wp-proud-search-elastic": "2026.06.01.1513",
         "proudcity/wp-proud-payment": "2026.04.21.0952",
         "proudcity/wp-proud-document": "2026.04.28.0912",
         "proudcity/wp-proud-location": "2025.12.03.1131",