feat(cog-pose): --adapter CLI flag for per-room calibration

Completes the end-to-end product path: cog-pose-estimation run --config
<cfg> --adapter <room.safetensors> loads the shared base + a per-room LoRA
adapter for calibrated inference. Adds InferenceEngine::with_adapter()
(default weights + adapter) and logs when a calibration adapter is active.
6/6 tests pass.

Co-Authored-By: claude-flow <ruv@ruv.net>

v2/crates/cog-pose-estimation/src/inference.rs

@@ -191,6 +191,12 @@ impl InferenceEngine {
         Self::with_weights(default_weights_path().as_deref())
     }
 
+    /// Engine from the default base weights plus an optional per-room calibration
+    /// adapter (ADR-150 §3.5). Used by `cog-pose-estimation run --adapter <path>`.
+    pub fn with_adapter(adapter_path: Option<&Path>) -> Result<Self, Box<dyn std::error::Error>> {
+        Self::with_weights_and_adapter(default_weights_path().as_deref(), adapter_path)
+    }
+
     /// Create an engine with a specific weights path (used by `--config`
     /// in `cog-pose-estimation run`). If `weights_path` is `None`, the
     /// stub fallback is used.

v2/crates/cog-pose-estimation/src/main.rs

@@ -42,6 +42,11 @@ enum Cmd {
         /// Path to runtime config JSON. See `cog/config.schema.json`.
         #[arg(long, value_name = "PATH")]
         config: PathBuf,
+        /// Optional per-room LoRA calibration adapter (ADR-150 §3.5). Fit one with
+        /// `aether-arena/calibration/calibrate.py`; attaching it recovers SOTA-level
+        /// pose in an unseen room/person.
+        #[arg(long, value_name = "PATH")]
+        adapter: Option<PathBuf>,
     },
 }
 
@@ -53,7 +58,7 @@ fn main() -> std::process::ExitCode {
         Cmd::Version => cmd_version(),
         Cmd::Manifest => cmd_manifest(),
         Cmd::Health => cmd_health(),
-        Cmd::Run { config } => cmd_run(config),
+        Cmd::Run { config, adapter } => cmd_run(config, adapter),
     };
 
     match result {
@@ -99,11 +104,17 @@ fn cmd_health() -> Result<(), Box<dyn std::error::Error>> {
     }
 }
 
-fn cmd_run(config_path: PathBuf) -> Result<(), Box<dyn std::error::Error>> {
+fn cmd_run(
+    config_path: PathBuf,
+    adapter: Option<PathBuf>,
+) -> Result<(), Box<dyn std::error::Error>> {
     let cfg = CogConfig::load(&config_path)?;
     emit_event(&Event::run_started(COG_ID, &cfg));
 
-    let engine = InferenceEngine::new()?;
+    let engine = InferenceEngine::with_adapter(adapter.as_deref())?;
+    if engine.is_calibrated() {
+        tracing::info!("per-room calibration adapter loaded");
+    }
     let rt = tokio::runtime::Builder::new_multi_thread()
         .enable_all()
         .build()?;