feat: improve sequencer error handling and shutdown/restart sequence

[atanmarko]

Description

Updated sequencer error handling of communication with subnet node and tce.

Fixes TP-828

Additions and Changes

• Backoff timeouts are increased, for connection to subnet or tce node to 12 hours
• In case of the failed certificate submit to the tce, or watch certificate channel failure, shutdown and restart sequencer
• When initial sequencer backoff launch sequence fails, retry again (restart sequencer)

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

Attention: 120 lines in your changes are missing coverage. Please review.

Comparison is base (355b08a) 0.00% compared to head (2eb02ce) 67.79%.

Files	Patch %	Lines
crates/topos-sequencer/src/lib.rs	0.00%	63 Missing ⚠️
crates/topos-sequencer/src/app_context.rs	0.00%	26 Missing ⚠️
crates/topos-sequencer-subnet-client/src/lib.rs	0.00%	20 Missing ⚠️
crates/topos-sequencer-subnet-runtime/src/proxy.rs	0.00%	8 Missing ⚠️
crates/topos-tce-proxy/src/client.rs	76.92%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           main     #428       +/-   ##
=========================================
+ Coverage      0   67.79%   +67.79%     
=========================================
  Files         0      224      +224     
  Lines         0    13127    +13127     
=========================================
+ Hits          0     8900     +8900     
- Misses        0     4227     +4227     

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