feat: MAINT-001 - Fix Ruff violations across all Python source

packages/tracker/meshnet_tracker/server.py

@@ -53,10 +53,6 @@ from typing import Any
 from .accounts import DEFAULT_ACCOUNTS_DB_PATH, AccountStore
 from .auth import is_validator_token, sign_hive_request, verify_hive_request
 from .capability import (
-    DEFAULT_POLICY as DEFAULT_CAPABILITY_POLICY,
-    POLICY_COMPAT,
-    POLICY_ENFORCE,
-    STATE_ABSENT,
     STATE_ADMITTED,
     STATE_MODEL_MISMATCH,
     STATE_SHARD_MISMATCH,
@@ -69,7 +65,7 @@ from .capability import (
 )
 from .wallet_proof import binding_message, verify_wallet_signature
 from .billing import DEFAULT_BILLING_DB_PATH, BillingLedger
-from .calibration import DEFAULT_CALIBRATION_DB_PATH, ToplocCalibrationStore
+from .calibration import ToplocCalibrationStore
 from .hf_pricing import DEFAULT_HF_PRICING_LOG_DB_PATH, HfPricingLog, refresh_preset_price
 from .gossip import NodeGossip
 from .logging_setup import tracker_logger
@@ -2566,8 +2562,8 @@ def _estimate_prompt_tokens(body: dict) -> int | None:
 
 
 def _requested_completion_token_limit(body: dict) -> int | None:
-    for field in ("max_completion_tokens", "max_tokens"):
-        value = body.get(field)
+    for key in ("max_completion_tokens", "max_tokens"):
+        value = body.get(key)
         if isinstance(value, bool):
             return None
         if isinstance(value, (int, float)):
@@ -2948,7 +2944,7 @@ class _TrackerHTTPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
 
 
 class _TrackerHandler(http.server.BaseHTTPRequestHandler):
-    def log_message(self, fmt, *args):  # noqa: suppress request logs in tests
+    def log_message(self, fmt, *args):  # suppress request logs in tests
         pass
 
     def _send_json(self, status: int, data: dict, headers: dict[str, str] | None = None) -> None:
@@ -7069,10 +7065,6 @@ class TrackerServer:
             shard_end   = int(payload["shard_end"])   if payload.get("shard_end")   is not None else None
         except (TypeError, ValueError):
             return
-        try:
-            friendly_name = _normalize_friendly_name(payload.get("friendly_name"))
-        except ValueError:
-            friendly_name = None
         # The replicated payload is the raw registration body, so the follower can
         # resolve precision exactly as the leader did -- including telling a legacy
         # absent `quantization` from a declared one. Dropping these fields here