[GEMINI-HARDEN-01] Replace hard-coded fleet inventory with repo-native config

Add fleet.inventory and fleet.path_contracts to config.yaml:
- Central source of truth for IPs, ports, roles, remote paths
- Introduce get_config_path(), load_fleet_inventory(), get_path_contract()
- Updated fleet_llama.py, self_healing.py, telemetry.py, agent_dispatch.py,
  skill_installer.py to read from config instead of hard-coded dicts/paths
- Documented inventory contract and override mechanism in scripts/README.md

Scripts retain forward-compatible fallback defaults for backwards compatibility.

Closes #433

scripts/telemetry.py

@@ -17,14 +17,32 @@ if SCRIPT_DIR not in sys.path:
     sys.path.insert(0, SCRIPT_DIR)
 
 from ssh_trust import VerifiedSSHExecutor
+import yaml
 
 # --- CONFIGURATION ---
-FLEET = {
-    "mac": "10.1.10.77",
-    "ezra": "143.198.27.163",
-    "allegro": "167.99.126.228",
-    "bezalel": "159.203.146.185"
-}
+
+def get_config_path():
+    return os.environ.get('TIMMY_CONFIG') or os.path.join(
+        os.path.dirname(os.path.abspath(__file__)), '..', 'config.yaml'
+    )
+
+def load_fleet_inventory():
+    """Return {{host: ip}} map from config.yaml or fallback defaults."""
+    try:
+        with open(get_config_path(), 'r') as f:
+            cfg = yaml.safe_load(f)
+        inv = cfg.get('fleet', {}).get('inventory', {})
+        if inv:
+            return {k: v['ip'] for k, v in inv.items()}
+    except Exception:
+        pass
+    return {
+        "mac": "10.1.10.77",
+        "ezra": "143.198.27.163",
+        "allegro": "167.99.126.228",
+        "bezalel": "159.203.146.185",
+    }
+FLEET = load_fleet_inventory()  # dict {host: ip} loaded from config or defaults
 TELEMETRY_FILE = "logs/telemetry.json"
 
 class Telemetry: