fix: correct protocol version header, disable SQL logging, document deployment pipeline

- ServerApiClient: use X-Cameleer-Protocol-Version: 1 (server expects "1", not "2")
- Disable Hibernate show-sql in dev profile (too verbose)
- CLAUDE.md: document deployment pipeline architecture, M2M server role in bootstrap,
  runtime-base image in CI

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/main/java/net/siegeln/cameleer/saas/identity/ServerApiClient.java

@@ -45,7 +45,7 @@ public class ServerApiClient {
                 .get()
                 .uri(uri)
                 .header("Authorization", "Bearer " + getAccessToken())
-                .header("X-Cameleer-Protocol-Version", "2");
+                .header("X-Cameleer-Protocol-Version", "1");
     }
 
     private synchronized String getAccessToken() {

src/main/resources/application-dev.yml

@@ -1,3 +1,3 @@
 spring:
   jpa:
-    show-sql: true
+    show-sql: false