feat(bufferbloat): parse, log, and highlight under-load latency + pac…

[GoWithitRoger]

…ket loss; compute bufferbloat deltas

Implements Tickets #1–#4 to integrate bufferbloat observability, thresholds, parsing, logging, and tests.

• config.py
  • add LATENCY_UNDER_LOAD_THRESHOLD (ms) and SPEEDTEST_PACKET_LOSS_THRESHOLD (%)
  • add BUFFERBLOAT_DELTA_THRESHOLD (ms) for idle→load delta highlighting
• main.py
  • SpeedResults: extend TypedDict with:
    • local_latency_down_load_ms, local_latency_up_load_ms, local_packet_loss_pct
  • run_local_speed_test_task():
    • parse Ookla JSON: download.latency.iqm, upload.latency.iqm, packetLoss (with .get defaults)
    • include parsed metrics in return dict
  • log_results():
    • include new fields in CSV: Local_Load_Down_ms, Local_Load_Up_ms, Local_Pkt_Loss_Pct
    • print bufferbloat lines in console with thresholds:
      • Latency (Download Load), Latency (Upload Load), Speedtest Packet Loss
    • add calculated deltas to CSV/console: - Download_Bufferbloat_ms, Upload_Bufferbloat_ms (computed vs idle WAN RTT)
    • consistent float formatting (CSV 3dp; console 2dp for latency, 2dp for %)
  • perform_checks():
    • compute bufferbloat deltas: (under-load latency − idle latency) for down/up
  • run_speed_test_task():
    • improve waiting logic by waiting for the results table (robustness for selenium flow)
  • minor CSV formatting simplification for the data row list comprehension

tests:

• tests/test_core.py
  • update SPEEDTEST_JSON_OUTPUT to include latency.iqm and packetLoss
  • assert parsing of new metrics
  • add test_local_speed_test_parsing_missing_keys (defaults to 0.0 without crash)
• tests/test_logging.py
  • extend MOCK_DATA_COMPLETE with new metrics
  • test_log_results_csv_creation: assert headers include new fields; data row contains “75.500”
  • test_log_results_console_output_highlighting:
    • set thresholds for bufferbloat
    • assert red highlighting for anomalous load latencies and packet loss
  • add boundary test (equal-to-threshold NOT highlighted)
  • add precision tests:
    • CSV: 3dp checks for new fields
    • console: 2dp for latency and packet loss
• tests/test_selenium_tasks.py
  • remains green after switching to table-based wait (ensures stable speed test flow)
  • (adjust mocks to reflect new waiting behavior if needed)

chore: lint, type-check, and verification

• ty check: All checks passed
• ruff check: All checks passed
• pytest: full suite passes locally

Refs: Ticket #1 (config/models), Ticket #2 (Ookla parsing), Ticket #3 (logging/reporting), Ticket #4 (tests)