✨[RUM-10962][Remote config] support js strategy

[bcaudan]

Motivation

Support resolving a remote configuration option to a js variable value by using a simple JSON path.

Changes

• implements a simple JSON path parser supporting:
  • dot notation
  • bracket notation
  • array exact index
• support retrieving value from a js variable

Test instructions

No backend to test the new options yet

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.

[datadog-datadog-prod-us1]

✅ Tests

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

🎯 Code Coverage
• Patch Coverage: 98.99%
• Total Coverage: 92.65% (+0.38%)

View detailed report

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[cit-pr-commenter]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	155.93 KiB	157.43 KiB	1.50 KiB	0.96%	✅
Rum Recorder	19.53 KiB	19.53 KiB	0 B	0.00%	✅
Rum Profiler	5.18 KiB	5.18 KiB	0 B	0.00%	✅
Logs	55.12 KiB	55.12 KiB	0 B	0.00%	✅
Flagging	N/A	931 B	931 B	N/A%	✅
Rum Slim	113.80 KiB	115.30 KiB	1.49 KiB	1.31%	✅
Worker	23.60 KiB	23.60 KiB	0 B	0.00%	✅

🚀 CPU Performance

Action Name	Base Average Cpu Time (ms)	Local Average Cpu Time (ms)	𝚫
addglobalcontext	0.008	0.008	0.001
addaction	0.023	0.028	0.005
addtiming	0.006	0.004	-0.002
adderror	0.021	0.017	-0.004
startstopsessionreplayrecording	0.001	0.001	-0.000
startview	0.009	0.005	-0.003
logmessage	0.025	0.023	-0.002

🧠 Memory Performance

Action Name	Base Consumption Memory (bytes)	Local Consumption Memory (bytes)	𝚫 (bytes)
addglobalcontext	24.96 KiB	25.67 KiB	727 B
addaction	45.73 KiB	45.38 KiB	-358 B
addtiming	24.70 KiB	24.93 KiB	235 B
adderror	51.53 KiB	51.61 KiB	86 B
startstopsessionreplayrecording	24.71 KiB	24.12 KiB	-604 B
startview	423.36 KiB	428.31 KiB	4.95 KiB
logmessage	42.11 KiB	42.41 KiB	308 B

🔗 RealWorld