fix(mqtt): Publish mosquitto bridge status to c8y when enabled

[albinsuresh]

Proposed changes

If the mosquitto bridge is used for C8y connectivity, then the bridge service status must also be published to C8y.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

#2898

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 78.0%. Comparing base (c53e14a) to head (8a91efb).
Report is 1 commits behind head on main.

❗ Current head 8a91efb differs from pull request most recent head 48fe6a9

Please upload reports for the commit 48fe6a9 to get more accurate results.

Additional details and impacted files

Files	Coverage Δ
crates/extensions/c8y_mapper_ext/src/converter.rs	83.6% <0.0%> (-0.1%)	⬇️

... and 8 files with indirect coverage changes

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
427	14	3	441	96.83	1h31m40.235889s

Failed Tests

Name	Message	⏱️ Duration	Suite
Set Configuration when file does not exist	Several failures occurred: 1) Expected operation (id=10406589) to be SUCCESSFUL, but got: PENDING (failureReason: ) 2) Expected operation (id=10406733) to be SUCCESSFUL, but got: PENDING (failureReason: ) 3) DeviceNotFound 4) DeviceNotFound	307.759 s	Configuration Operation
Set Configuration when file exists	Several failures occurred: 1) Expected operation (id=10408214) to be SUCCESSFUL, but got: PENDING (failureReason: ) 2) Expected operation (id=10408502) to be SUCCESSFUL, but got: PENDING (failureReason: ) 3) DeviceNotFound 4) DeviceNotFound	310.866 s	Configuration Operation
Set configuration with broken url	Several failures occurred: 1) Expected operation (id=10408658) to be FAILED, but got: PENDING 2) DeviceNotFound	158.886 s	Configuration Operation
Get Configuration from Main Device	Several failures occurred: 1) Expected operation (id=10408667) to be SUCCESSFUL, but got: PENDING (failureReason: ) 2) Expected operation (id=10408669) to be SUCCESSFUL, but got: PENDING (failureReason: )	242.539 s	Configuration Operation
Get Configuration from Child Device	Several failures occurred: 1) DeviceNotFound 2) DeviceNotFound	61.523 s	Configuration Operation
Get Unknown Configuration Type From Device	Several failures occurred: 1) Expected operation (id=10408671) to be FAILED, but got: PENDING 2) DeviceNotFound	63.132 s	Configuration Operation
Get non existent configuration file From Device	Several failures occurred: 1) Expected operation (id=10408673) to be FAILED, but got: PENDING 2) DeviceNotFound	63.415 s	Configuration Operation
Update configuration plugin config via cloud	Several failures occurred: 1) Supported Configuration fragment (c8y_SupportedConfigurations) does not match. wanted: ['/etc/tedge/tedge.toml', 'CONFIG1', 'CONFIG1_BINARY', 'system.toml', 'tedge-configuration-plugin'] got: ['/etc/tedge/tedge.toml', 'system.toml', 'tedge-configuration-plugin'] 2) DeviceNotFound	64.225 s	Configuration Operation
Modify configuration plugin config via local filesystem modify inplace	Several failures occurred: 1) Supported Configuration fragment (c8y_SupportedConfigurations) does not match. wanted: ['/etc/tedge/tedge.toml', 'CONFIG1', 'CONFIG1_BINARY', 'system.toml', 'tedge-configuration-plugin'] got: ['/etc/tedge/tedge.toml', 'system.toml', 'tedge-configuration-plugin'] 2) DeviceNotFound	61.934 s	Configuration Operation
Modify configuration plugin config via local filesystem overwrite	Several failures occurred: 1) Supported Configuration fragment (c8y_SupportedConfigurations) does not match. wanted: ['/etc/tedge/tedge.toml', 'CONFIG1', 'CONFIG1_BINARY', 'system.toml', 'tedge-configuration-plugin'] got: ['/etc/tedge/tedge.toml', 'system.toml', 'tedge-configuration-plugin'] 2) DeviceNotFound	63.370 s	Configuration Operation
Update configuration plugin config via local filesystem copy	Several failures occurred: 1) Supported Configuration fragment (c8y_SupportedConfigurations) does not match. wanted: ['/etc/tedge/tedge.toml', 'CONFIG1', 'CONFIG1_BINARY', 'system.toml', 'tedge-configuration-plugin'] got: ['/etc/tedge/tedge.toml', 'system.toml', 'tedge-configuration-plugin'] 2) DeviceNotFound	63.802 s	Configuration Operation
Update configuration plugin config via local filesystem move (different directory)	Several failures occurred: 1) Supported Configuration fragment (c8y_SupportedConfigurations) does not match. wanted: ['/etc/tedge/tedge.toml', 'CONFIG1', 'CONFIG1_BINARY', 'system.toml', 'tedge-configuration-plugin'] got: ['/etc/tedge/tedge.toml', 'system.toml', 'tedge-configuration-plugin'] 2) DeviceNotFound	62.557 s	Configuration Operation
Update configuration plugin config via local filesystem move (same directory)	Several failures occurred: 1) Supported Configuration fragment (c8y_SupportedConfigurations) does not match. wanted: ['/etc/tedge/tedge.toml', 'CONFIG1', 'CONFIG1_BINARY', 'system.toml', 'tedge-configuration-plugin'] got: ['/etc/tedge/tedge.toml', 'system.toml', 'tedge-configuration-plugin'] 2) DeviceNotFound	64.728 s	Configuration Operation
Default plugin configuration	Matching messages is less than minimum. wanted: 1 got: 0 messages: []	31.172 s	Configuration Operation

[rina23q]

This PR fixes the reported bug

[didier-wenzek]

Approved

[gligorisaev]

The test script is well-structured to verify the existence of an external identity and the status of the bridge service.