fix: init jobsdb logger at the right place

[chandumlg]

Description

There are references to assertError function in init function. assertError uses logger to log some internal data structures. But logger is initialised in the end of init. This is causing a nil pointer exception in case of errors in init function.

In this pr, initing the logger in the beginning of init.

Notion Ticket

https://www.notion.so/rudderstacks/8aac9087df644365acdf64e28e290153?v=6e06b0a5ade24f0aa5ffe05dc2972e84&p=69fbdd52094d428583317ad0a5dcc64f&pm=s

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Base: 45.83% // Head: 45.71% // Decreases project coverage by -0.11% ⚠️

Coverage data is based on head (fabf8cf) compared to base (bc6afca).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2729      +/-   ##
==========================================
- Coverage   45.83%   45.71%   -0.12%     
==========================================
  Files         295      295              
  Lines       48503    48503              
==========================================
- Hits        22233    22175      -58     
- Misses      24867    24928      +61     
+ Partials     1403     1400       -3     

Impacted Files	Coverage Δ
jobsdb/jobsdb.go	72.97% <100.00%> (-0.30%)	⬇️
processor/stash/stash.go	44.56% <0.00%> (-22.10%)	⬇️
...rvices/streammanager/kafka/client/testutil/util.go	66.99% <0.00%> (-3.89%)	⬇️
config/backend-config/namespace_config.go	67.00% <0.00%> (-3.00%)	⬇️
services/db/recovery.go	50.60% <0.00%> (-1.21%)	⬇️
jobsdb/backup.go	76.30% <0.00%> (-0.35%)	⬇️
processor/processor.go	86.40% <0.00%> (+0.41%)	⬆️
router/manager/manager.go	100.00% <0.00%> (+3.29%)	⬆️
config/backend-config/noop.go	42.10% <0.00%> (+42.10%)	⬆️

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