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]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
3072	1	3071	177

View the top 1 failed test(s) by shortest run time

dimos.protocol.pubsub.impl.webrtc.test_replay_repository_cli::test_serve_rejects_missing_s3_bucket

Stack Traces | 0.013s run time

tmp_path = PosixPath('.../pytest-0/popen-gw0/test_serve_rejects_missing_s3_0')

    def test_serve_rejects_missing_s3_bucket(tmp_path: Path) -> None:
        result = runner.invoke(
            replay_repository_cli.replay_repository_app,
            ["serve", "--root", str(tmp_path), "--backend", "s3"],
        )
    
        assert result.exit_code == 2
>       assert "--s3-bucket is required" in result.output
E       assert '--s3-bucket is required' in "\x1b[33mUsage: \x1b[0mroot serve [OPTIONS]\n\x1b[2mTry \x1b[0m\x1b[2;34m'root serve \x1b[0m\x1b[1;2;34m-\x1b[0m\x1b[1;2;34m-help\x1b[0m\x1b[2;34m'\x1b[0m\x1b[2m for help.\x1b[0m\n\x1b[31m╭─\x1b[0m\x1b[31m Error \x1b[0m\x1b[31m─────────────────────────────────────────────────────────────────────\x1b[0m\x1b[31m─╮\x1b[0m\n\x1b[31m│\x1b[0m Invalid value: DIMOS_REPLAY_S3_BUCKET or \x1b[1;36m-\x1b[0m\x1b[1;36m-s3\x1b[0m\x1b[1;36m-bucket\x1b[0m is required for the s3  \x1b[31m│\x1b[0m\n\x1b[31m│\x1b[0m backend                                                                      \x1b[31m│\x1b[0m\n\x1b[31m╰──────────────────────────────────────────────────────────────────────────────╯\x1b[0m\n"
E        +  where "\x1b[33mUsage: \x1b[0mroot serve [OPTIONS]\n\x1b[2mTry \x1b[0m\x1b[2;34m'root serve \x1b[0m\x1b[1;2;34m-\x1b[0m\x1b[1;2;34m-help\x1b[0m\x1b[2;34m'\x1b[0m\x1b[2m for help.\x1b[0m\n\x1b[31m╭─\x1b[0m\x1b[31m Error \x1b[0m\x1b[31m─────────────────────────────────────────────────────────────────────\x1b[0m\x1b[31m─╮\x1b[0m\n\x1b[31m│\x1b[0m Invalid value: DIMOS_REPLAY_S3_BUCKET or \x1b[1;36m-\x1b[0m\x1b[1;36m-s3\x1b[0m\x1b[1;36m-bucket\x1b[0m is required for the s3  \x1b[31m│\x1b[0m\n\x1b[31m│\x1b[0m backend                                                                      \x1b[31m│\x1b[0m\n\x1b[31m╰──────────────────────────────────────────────────────────────────────────────╯\x1b[0m\n" = <Result SystemExit(2)>.output

result     = <Result SystemExit(2)>
tmp_path   = PosixPath('.../pytest-0/popen-gw0/test_serve_rejects_missing_s3_0')

.../impl/webrtc/test_replay_repository_cli.py:154: AssertionError

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