feat: expose job attempts metrics

[perekopskiy]

What ❔

Every component implementing JobProcessor now exposes two metrics:

• <SERVICE_NAME>.job_attempts -- heatmaps in grafana will be added displaying this metric.
• <SERVICE_ANME>.max_attempts_reached -- alert will fire when this metric is increased (alert rules not added yet).

Why ❔

Better monitoring and alerting

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zk fmt and zk lint.

[codecov]

Codecov Report

Attention: 24 lines in your changes are missing coverage. Please review.

Comparison is base (d8ab843) 31.58% compared to head (2ce1446) 31.58%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #114      +/-   ##
==========================================
- Coverage   31.58%   31.58%   -0.01%     
==========================================
  Files         477      477              
  Lines       25431    25455      +24     
==========================================
+ Hits         8033     8039       +6     
- Misses      17398    17416      +18     

Files	Coverage Δ
core/bin/contract-verifier/src/verifier.rs	0.00% <ø> (ø)
core/lib/dal/src/fri_proof_compressor_dal.rs	0.00% <ø> (ø)
core/lib/dal/src/fri_prover_dal.rs	0.00% <ø> (ø)
core/lib/dal/src/fri_witness_generator_dal.rs	0.00% <ø> (ø)
core/lib/dal/src/prover_dal.rs	39.62% <100.00%> (+0.57%)	⬆️
core/lib/prometheus_exporter/src/lib.rs	62.74% <100.00%> (+0.74%)	⬆️
core/lib/types/src/proofs.rs	43.39% <ø> (ø)
prover/prover_fri/tests/basic_test.rs	0.00% <ø> (ø)
prover/witness_generator/tests/basic_test.rs	0.00% <ø> (ø)
core/lib/dal/src/witness_generator_dal.rs	49.76% <75.00%> (+0.47%)	⬆️
... and 5 more

... and 5 files with indirect coverage changes

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