feat: update and expose prometheus metrics and grafana

[hadjiszs]

Description

• get back some removed metrics
• add prometheus labels (run_id, run_number)
• add the delivery latency metric
• update the grafana dashboard

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Merging #273 (4bc6102) into main (fc27d4b) will increase coverage by 0.22%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##             main     #273      +/-   ##
==========================================
+ Coverage   52.57%   52.80%   +0.22%     
==========================================
  Files         206      207       +1     
  Lines        9809     9833      +24     
==========================================
+ Hits         5157     5192      +35     
+ Misses       4652     4641      -11     

Files Changed	Coverage Δ
crates/topos-tce-broadcast/src/lib.rs	89.13% <ø> (ø)
...opos-tce-broadcast/src/task_manager_futures/mod.rs	84.61% <ø> (ø)
crates/topos-metrics/src/lib.rs	43.33% <58.82%> (+33.33%)	⬆️
crates/topos-tce/src/app_context/protocol.rs	75.00% <75.00%> (+0.88%)	⬆️
crates/topos-metrics/src/api.rs	100.00% <100.00%> (ø)
crates/topos-tce-api/src/grpc/mod.rs	57.40% <100.00%> (+0.39%)	⬆️
crates/topos-tce/src/app_context.rs	88.67% <100.00%> (+0.21%)	⬆️
crates/topos-tce/src/app_context/api.rs	59.57% <100.00%> (+1.33%)	⬆️