docs: rewrite README with structured overview and quick start guide

Replaces the minimal project description with a comprehensive README
including a component overview table, quick start instructions, common
Ansible operations, and links to detailed documentation. Aligns with
Red Panda Approval™ standards.

ansible/alloy/miranda/config.alloy.j2

@@ -0,0 +1,131 @@
+logging {
+  level = "{{alloy_log_level}}"
+}
+
+loki.source.file "system_logs" {
+  targets = [
+    {__path__ = "/var/log/syslog", job = "syslog"},
+    {__path__ = "/var/log/auth.log", job = "auth"},
+  ]
+  forward_to = [loki.write.default.receiver]
+}
+
+loki.source.journal "systemd_logs" {
+  forward_to = [loki.relabel.journal_apps.receiver]
+  labels = {
+    job = "systemd",
+    hostname = "{{inventory_hostname}}",
+    environment = "{{deployment_environment}}",
+  }
+}
+
+loki.relabel "journal_apps" {
+  forward_to = [loki.write.default.receiver]
+
+  rule {
+    source_labels = ["__journal__systemd_unit"]
+    regex         = "mcpo\\.service"
+    target_label  = "job"
+    replacement   = "mcpo"
+  }
+
+  rule {
+    source_labels = ["__journal__systemd_unit"]
+    regex         = "mcpo\\.service"
+    target_label  = "app"
+    replacement   = "mcpo"
+  }
+}
+
+loki.source.syslog "argos_logs" {
+  listener {
+    address  = "127.0.0.1:{{argos_syslog_port}}"
+    protocol = "tcp"
+    syslog_format = "{{ syslog_format }}"
+    labels = {
+      job = "argos",
+      hostname = "{{inventory_hostname}}",
+      environment = "{{deployment_environment}}",
+    }
+  }
+  forward_to = [loki.write.default.receiver]
+}
+
+loki.source.syslog "grafana_mcp_logs" {
+  listener {
+    address  = "127.0.0.1:{{grafana_mcp_syslog_port}}"
+    protocol = "tcp"
+    syslog_format = "{{ syslog_format }}"
+    labels = {
+      job = "grafana_mcp",
+      hostname = "{{inventory_hostname}}",
+      environment = "{{deployment_environment}}",
+    }
+  }
+  forward_to = [loki.write.default.receiver]
+}
+
+loki.source.syslog "neo4j_cypher_logs" {
+  listener {
+    address  = "127.0.0.1:{{neo4j_cypher_syslog_port}}"
+    protocol = "tcp"
+    syslog_format = "{{ syslog_format }}"
+    labels = {
+      job = "neo4j-cypher",
+      hostname = "{{inventory_hostname}}",
+      environment = "{{deployment_environment}}",
+    }
+  }
+  forward_to = [loki.write.default.receiver]
+}
+
+loki.source.syslog "neo4j_memory_logs" {
+  listener {
+    address  = "127.0.0.1:{{neo4j_memory_syslog_port}}"
+    protocol = "tcp"
+    syslog_format = "{{ syslog_format }}"
+    labels = {
+      job = "neo4j-memory",
+      hostname = "{{inventory_hostname}}",
+      environment = "{{deployment_environment}}",
+    }
+  }
+  forward_to = [loki.write.default.receiver]
+}
+
+loki.source.syslog "gitea_mcp_logs" {
+  listener {
+    address  = "127.0.0.1:{{gitea_mcp_syslog_port}}"
+    protocol = "tcp"
+    syslog_format = "{{ syslog_format }}"
+    labels = {
+      job = "gitea-mcp",
+      hostname = "{{inventory_hostname}}",
+      environment = "{{deployment_environment}}",
+    }
+  }
+  forward_to = [loki.write.default.receiver]
+}
+
+prometheus.exporter.unix "default" {
+  include_exporter_metrics = true
+  disable_collectors = ["mdadm"]
+}
+
+prometheus.scrape "default" {
+  targets    = prometheus.exporter.unix.default.targets
+  forward_to = [prometheus.remote_write.default.receiver]
+  job_name = "mcp_docker_host"
+}
+
+prometheus.remote_write "default" {
+  endpoint {
+    url = "{{prometheus_remote_write_url}}"
+  }
+}
+
+loki.write "default" {
+  endpoint {
+    url = "{{loki_url}}"
+  }
+}