[ci skip] Move Terraform modules into stack directories

Move all 88 service modules (66 individual + 22 platform) from
modules/kubernetes/<service>/ into their corresponding stack directories:

- Service stacks: stacks/<service>/module/
- Platform stack: stacks/platform/modules/<service>/

This collocates module source code with its Terragrunt definition.
Only shared utility modules remain in modules/kubernetes/:
ingress_factory, setup_tls_secret, dockerhub_secret, oauth-proxy.

All cross-references to shared modules updated to use correct
relative paths. Verified with terragrunt run --all -- plan:
0 adds, 0 destroys across all 68 stacks.

stacks/tor-proxy/module/main.tf

@@ -0,0 +1,115 @@
+variable "tls_secret_name" {}
+variable "tier" { type = string }
+
+resource "kubernetes_namespace" "tor-proxy" {
+  metadata {
+    name = "tor-proxy"
+    labels = {
+      "istio-injection" : "disabled"
+      tier = var.tier
+    }
+  }
+}
+
+module "tls_secret" {
+  source          = "../../../modules/kubernetes/setup_tls_secret"
+  namespace       = "tor-proxy"
+  tls_secret_name = var.tls_secret_name
+}
+
+# resource "kubernetes_config_map" "tor_config" {
+#   metadata {
+#     name      = "tor-config"
+#     namespace = "tor-proxy"
+#     annotations = {
+#       "reloader.stakater.com/match" = "true"
+#     }
+#   }
+
+#   data = {
+#     "torrc" = file("${path.module}/.torrc")
+#   }
+# }
+
+resource "kubernetes_deployment" "tor-proxy" {
+  metadata {
+    name      = "tor-proxy"
+    namespace = "tor-proxy"
+    labels = {
+      app  = "tor-proxy"
+      tier = var.tier
+    }
+    annotations = {
+      "reloader.stakater.com/search" = "true"
+    }
+  }
+  spec {
+    replicas = 1
+    strategy {
+      type = "RollingUpdate"
+    }
+    selector {
+      match_labels = {
+        app = "tor-proxy"
+      }
+    }
+    template {
+      metadata {
+        labels = {
+          app = "tor-proxy"
+        }
+      }
+      spec {
+        container {
+          name  = "tor-proxy"
+          image = "dperson/torproxy:latest"
+          port {
+            name           = "http"
+            container_port = 8118
+            protocol       = "TCP"
+          }
+          port {
+            name           = "tor"
+            container_port = 9050
+            protocol       = "TCP"
+          }
+          #   volume_mount {
+          #     name       = "tor-config"
+          #     mount_path = "/etc/tor/torrc"
+          #     sub_path   = "torrc"
+          #   }
+        }
+        # volume {
+        #   name = "tor-config"
+        #   config_map {
+        #     name = kubernetes_config_map.tor_config.metadata[0].name
+        #   }
+        # }
+      }
+    }
+  }
+}
+
+resource "kubernetes_service" "tor-proxy" {
+  metadata {
+    name      = "tor-proxy"
+    namespace = "tor-proxy"
+    labels = {
+      "app" = "tor-proxy"
+    }
+  }
+
+  spec {
+    selector = {
+      app = "tor-proxy"
+    }
+    port {
+      name = "http"
+      port = 8118
+    }
+    port {
+      name = "tor"
+      port = 9050
+    }
+  }
+}