Resolve remote memory2 replays for Go2

[xiaoyaoqilan]

Summary

• add dimos-replay://owner/repository/object-id replay URIs
• download remote memory2 databases on demand
• verify content hashes, validate SQLite integrity, and cache verified recordings locally
• let the existing replay flow select the downloaded database through DIMOS_REPLAY_DB
• support the requested dimos --replay run unitree-go2 workflow

Motivation

This is PR 4 of the #3158 implementation stack. A recording uploaded in one location can be selected and replayed from another location without manually copying database files.

Stack dependency

• depends on Add indexed memory2 replay uploads #3185, Add S3-compatible replay object storage #3184, and Add WebRTC cross-region and replay repository MVP #3177
• review the commit after 0be0040 for the isolated change

Validation

• remote URI parsing, download, hash checking, cache reuse, and invalid-database paths are covered by tests
• targeted replay/Go2 tests passed
• ruff check, format checks, and targeted mypy passed

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[codecov]

Codecov Report

❌ Patch coverage is 77.92819% with 375 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
dimos/protocol/pubsub/impl/webrtc/mvp_cli.py	16.94%	195 Missing and 1 partial ⚠️
...s/protocol/pubsub/impl/webrtc/replay_repository.py	79.55%	59 Missing and 32 partials ⚠️
...rotocol/pubsub/impl/webrtc/replay_repository_s3.py	74.64%	23 Missing and 13 partials ⚠️
dimos/memory2/remote_replay.py	79.46%	15 Missing and 8 partials ⚠️
dimos/memory2/remote_dataset.py	87.36%	6 Missing and 6 partials ⚠️
...otocol/pubsub/impl/webrtc/replay_repository_cli.py	87.03%	5 Missing and 2 partials ⚠️
dimos/protocol/pubsub/impl/webrtc/mvp_metrics.py	88.46%	3 Missing and 3 partials ⚠️
...os/protocol/pubsub/impl/webrtc/providers/broker.py	80.00%	1 Missing and 1 partial ⚠️
.../pubsub/impl/webrtc/test_memory2_remote_dataset.py	98.97%	1 Missing ⚠️
dimos/robot/cli/dimos.py	0.00%	1 Missing ⚠️

@@            Coverage Diff             @@
##             main    #3186      +/-   ##
==========================================
- Coverage   73.77%   73.65%   -0.13%     
==========================================
  Files        1109     1123      +14     
  Lines      104383   107618    +3235     
  Branches     9567    10099     +532     
==========================================
+ Hits        77013    79268    +2255     
- Misses      24695    25563     +868     
- Partials     2675     2787     +112     

Flag	Coverage Δ
OS-ubuntu-24.04-arm	68.15% <77.92%> (+0.45%)	⬆️
OS-ubuntu-latest	70.17% <77.92%> (+0.40%)	⬆️
Py-3.10	70.17% <77.92%> (+0.40%)	⬆️
Py-3.11	70.17% <77.92%> (+0.40%)	⬆️
Py-3.12	?
Py-3.13	70.17% <77.92%> (+0.40%)	⬆️
Py-3.14	68.15% <77.92%> (-1.62%)	⬇️
Py-3.14t	70.17% <77.92%> (+0.40%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
dimos/core/global_config.py	88.63% <100.00%> (+5.68%)	⬆️
dimos/core/test_global_config.py	100.00% <100.00%> (ø)
dimos/memory2/cli/app.py	83.33% <100.00%> (+13.33%)	⬆️
...otocol/pubsub/impl/webrtc/providers/video_track.py	24.39% <ø> (-2.28%)	⬇️
...os/protocol/pubsub/impl/webrtc/test_mvp_metrics.py	100.00% <100.00%> (ø)
.../protocol/pubsub/impl/webrtc/test_remote_replay.py	100.00% <100.00%> (ø)
...tocol/pubsub/impl/webrtc/test_replay_repository.py	100.00% <100.00%> (ø)
...l/pubsub/impl/webrtc/test_replay_repository_cli.py	100.00% <100.00%> (ø)
...ol/pubsub/impl/webrtc/test_replay_repository_s3.py	100.00% <100.00%> (ø)
dimos/robot/unitree/go2/connection.py	60.52% <100.00%> (+5.05%)	⬆️
... and 10 more

... and 31 files with indirect coverage changes

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[xiaoyaoqilan]

Superseded by #3201. The implementation is consolidated into the dimos/hosted_data package and unified dimos data CLI.