feat: add announcer to dfdameon

[gaius-qi]

Description

• Add announcer to dfdameon.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov-commenter]

Codecov Report

Merging #1852 (2a00db3) into main (87e2fbe) will decrease coverage by 0.50%.
The diff coverage is 8.14%.

@@            Coverage Diff             @@
##             main    #1852      +/-   ##
==========================================
- Coverage   43.42%   42.92%   -0.51%     
==========================================
  Files         129      130       +1     
  Lines       16365    16575     +210     
==========================================
+ Hits         7107     7114       +7     
- Misses       8718     8919     +201     
- Partials      540      542       +2     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	42.92% <8.14%> (-0.51%)	⬇️

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

Impacted Files	Coverage Δ
client/config/peerhost.go	33.07% <ø> (ø)
client/config/peerhost_linux.go	0.00% <0.00%> (ø)
manager/rpcserver/rpcserver.go	3.12% <0.00%> (+<0.01%)	⬆️
scheduler/rpcserver/rpcserver.go	3.17% <0.00%> (ø)
scheduler/service/service.go	74.75% <ø> (+0.10%)	⬆️
client/daemon/announcer/announcer.go	8.61% <8.61%> (ø)
client/daemon/peer/peertask_piecetask_poller.go	48.63% <0.00%> (-2.74%)	⬇️
...ent/daemon/peer/peertask_piecetask_synchronizer.go	49.54% <0.00%> (-0.92%)	⬇️
client/daemon/peer/piece_manager.go	52.99% <0.00%> (-0.41%)	⬇️

[hyy0322]

lgtm

[bigerous]

Please add a switch configuration to close this function