fix: Add ddsource attribute to json-formatted logs

[PROFeNoM]

Description

Problem: The PHP Log pipeline is not automatically used to process PHP logs ==> No Log Correlation by default, despite the trace identifiers being injected.

Two solutions:

1. We inject the trace identifiers outside of context
2. We use ddsource

Either way, it seems like we should have always been using ddsource + it is more elegant and is the actual way of doing it.

TBD - I gotta double test this on my sandbox. generating the artifact...

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-06-20 15:00:03

Comparing candidate commit e1b1f33 in PR branch alex/fix/ddsource with baseline commit 3648fb5 in branch master.

Found 0 performance improvements and 5 performance regressions! Performance is the same for 173 metrics, 0 unstable metrics.

scenario:PDOBench/benchPDOBaseline

• 🟥 execution_time [+5.618µs; +13.686µs] or [+3.187%; +7.764%]

scenario:PDOBench/benchPDOBaseline-opcache

• 🟥 execution_time [+3.641µs; +12.147µs] or [+2.075%; +6.924%]

scenario:PDOBench/benchPDOOverhead-opcache

• 🟥 execution_time [+16.887µs; +18.821µs] or [+5.976%; +6.661%]

scenario:PDOBench/benchPDOOverheadWithDBM

• 🟥 execution_time [+9.917µs; +13.735µs] or [+3.281%; +4.544%]

scenario:PDOBench/benchPDOOverheadWithDBM-opcache

• 🟥 execution_time [+8.841µs; +16.218µs] or [+2.784%; +5.108%]

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 65.96%. Comparing base (3648fb5) to head (17bd3f3).
Report is 8 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (3648fb5) and HEAD (17bd3f3). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (3648fb5)	HEAD (17bd3f3)
tracer-php	12	10
appsec-extension	1	0

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #2727       +/-   ##
=============================================
- Coverage     77.83%   65.96%   -11.88%     
  Complexity     2212     2212               
=============================================
  Files           227      201       -26     
  Lines         26604    22596     -4008     
  Branches        988        0      -988     
=============================================
- Hits          20708    14906     -5802     
- Misses         5370     7690     +2320     
+ Partials        526        0      -526     

Flag	Coverage Δ
appsec-extension	?
tracer-extension	78.60% <ø> (+<0.01%)	⬆️
tracer-php	47.56% <0.00%> (-32.97%)	⬇️

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

Files	Coverage Δ
src/DDTrace/Integrations/Logs/LogsIntegration.php	0.00% <0.00%> (-93.29%)	⬇️

... and 66 files with indirect coverage changes

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