Add ClockSyncConfigurator for Unitree WebRTC

[leshy]

Problem

Closes #1344
Closes DIM-575

When running Unitree robots over WebRTC, clock drift between the host and robot causes timestamp mismatches. There was no automated check or fix for this.

Solution

• ClockSyncConfigurator pure py SNTP query detects clock offset (threshold: ±100ms). NTP unreachable -> gracefully warns (works offline). tries ntpdate > sntp > date -s fallback.

• system_checks() bridge - wraps SystemConfigurator(s) into a Blueprint.requirements() compatible callable

• system_configurator refactored into a package - base.py (framework), lcm.py (multicast/buffer), clock_sync.py (new).

• dimos/utils/human.py - consolidated 6 scattered duration/byte/number formatters into human_duration(), human_bytes(), human_number().

• Integrated into unitree_go2_basic and unitree_g1_basic hardware blueprints.

Breaking Changes

None

How to Test

# offset system clock, run configurator
sudo date -s "+1 second"
dimos --replay run unitree-go2

Issues

configurator API needs some improvements

• always print comands that will be executed in a consistent way (no per-configurator str building)
• OS checks belong in the configurator itself, inconvinent to check for OS and use different configurators externally

Contributor License Agreement

• I have read and approved the CLA.

[greptile-apps]

Greptile Summary

This PR adds automated clock synchronization checks for Unitree WebRTC deployments and consolidates human-readable formatters across the codebase.

Key Changes:

• ClockSyncConfigurator performs pure-Python SNTP queries to detect clock drift (±100ms threshold) with graceful degradation when NTP is unreachable
• system_checks() bridge function integrates SystemConfigurator into Blueprint.requirements() workflow
• system_configurator refactored from single file into package (base.py, lcm.py, clock_sync.py) with backward-compatible re-exports
• dimos/utils/human.py consolidates 6 scattered formatters into 3 functions: human_duration(), human_bytes(), human_number()
• Integrated into unitree_go2_basic and unitree_g1_basic hardware blueprints

Breaking Changes (intentional):

• BandwidthUnit enum removed from lcmspy.py
• Topic.kbps_hr() and Topic.total_traffic_hr() now return str instead of tuple[float, BandwidthUnit]

Testing:

• 67 total tests including comprehensive clock sync coverage (NTP reachable/unreachable, offset scenarios, platform-specific fixes)
• All breaking changes have corresponding test updates

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• Clean refactoring with comprehensive test coverage (67 tests), graceful error handling, backward compatibility maintained via package re-exports, and breaking changes are intentional/documented
• No files require special attention

Important Files Changed

Filename	Overview
dimos/protocol/service/system_configurator/clock_sync.py	New ClockSyncConfigurator for detecting/fixing clock drift via SNTP, handles errors gracefully
dimos/protocol/service/system_configurator/base.py	Extracted base SystemConfigurator framework and added system_checks() bridge function
dimos/utils/human.py	Consolidated human-readable formatters from 6 locations into 3 functions
dimos/robot/unitree/go2/blueprints/basic/unitree_go2_basic.py	Added ClockSyncConfigurator to blueprint requirements for WebRTC deployments
dimos/robot/unitree/g1/blueprints/basic/unitree_g1_basic.py	Added ClockSyncConfigurator to blueprint requirements for WebRTC deployments
dimos/utils/cli/lcmspy/lcmspy.py	Breaking change: Topic.kbps_hr() and total_traffic_hr() now return str instead of tuple

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Blueprint.requirements] --> B[system_checks wrapper]
    B --> C[configure_system]
    C --> D{CI environment?}
    D -->|Yes| E[Skip all checks]
    D -->|No| F[Run ClockSyncConfigurator.check]
    F --> G{NTP query}
    G -->|Timeout/Error| H[Pass gracefully]
    G -->|Success| I{abs offset > 100ms?}
    I -->|No| J[Pass]
    I -->|Yes| K[Show explanation]
    K --> L{User approves fix?}
    L -->|No non-critical| M[Continue with warning]
    L -->|Yes| N[Run fix chain]
    N --> O{Platform?}
    O -->|Linux| P[ntpdate > sntp > date -s]
    O -->|macOS| Q[sntp -sS]
    P --> R[Blueprint starts]
    Q --> R
    J --> R
    H --> R
    M --> R

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