fix(ci): add release-compile safeguard to catch debugImplementation regressions (#336)

- Reverts okhttp.logging dependency from debugImplementation back to
  implementation so it's on the release classpath
- Adds compileReleaseKotlin CI job to catch release-variant compilation
  errors on every PR
- Fixes signing config to allow compileReleaseKotlin without keystore env
  vars (graceful fallback instead of hard require())
- Updates AGENTS.md with dependency scoping pitfall and CI docs

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/build.gradle.kts

@@ -41,15 +41,21 @@ android {
                 val alias = System.getenv("KEY_ALIAS")
                 val keyPass = System.getenv("KEY_PASSWORD")
 
-                require(!storePath.isNullOrEmpty()) { "KEYSTORE_PATH environment variable is not set" }
-                require(!storePass.isNullOrEmpty()) { "KEYSTORE_PASSWORD environment variable is not set" }
-                require(!alias.isNullOrEmpty()) { "KEY_ALIAS environment variable is not set" }
-                require(!keyPass.isNullOrEmpty()) { "KEY_PASSWORD environment variable is not set" }
-
-                storeFile = file(storePath)
-                storePassword = storePass
-                keyAlias = alias
-                keyPassword = keyPass
+                if (storePath != null && storePass != null && alias != null && keyPass != null) {
+                    storeFile = file(storePath)
+                    storePassword = storePass
+                    keyAlias = alias
+                    keyPassword = keyPass
+                } else {
+                    // Env vars missing — signing deferred to release workflow.
+                    // Don't hard-require(): that would break compileReleaseKotlin
+                    // in CI where keystore secrets aren't set.
+                    logger.warn("Release signing config missing env vars — signing deferred to release workflow")
+                    storeFile = file("dummy.keystore")
+                    storePassword = "dummy"
+                    keyAlias = "dummy"
+                    keyPassword = "dummy"
+                }
             } else {
                 // Dummy values for evaluation configuration during non-release builds
                 storeFile = file("dummy.keystore")
@@ -128,7 +134,7 @@ dependencies {
 
     // Networking
     implementation(libs.okhttp)
-    debugImplementation(libs.okhttp.logging)
+    implementation(libs.okhttp.logging)
     implementation(libs.retrofit)
     implementation(libs.retrofit.converter.gson)
     implementation(libs.gson)