♻️ Simplify debugger template evaluation

[watson]

Motivation

Simplify debugger template evaluation and remove unnecessary cache cleanup paths. The previous implementation stored compiled template cache objects on probes and explicitly cleared those caches when probes were removed, but the caches were already only reachable through the probe instance and could be garbage-collected with it. Moving evaluation behind an initialized-probe function keeps this behavior local to probe initialization and makes the runtime code easier to maintain.

Changes

• Remove explicit cache clearing for probe conditions and dynamic templates when probes are removed or cleared.
• Replace the compiled template object stored in probe.template with an evaluateTemplate(context) function on initialized probes.
• Keep probe.template as the original template string after initialization.
• Update template/probe tests to cover the new evaluation shape instead of cache object internals.

Test instructions

• yarn test:unit --spec packages/browser-debugger/src/domain/template.spec.ts --spec packages/browser-debugger/src/domain/probes.spec.ts
• yarn typecheck

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[watson]

• ✨ Add browser debugger Capture Expressions #4731
• ♻️ Simplify debugger template evaluation #4730 👈 (View in Graphite)
• main

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[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	171.79 KiB	171.79 KiB	0 B	0.00%	✅
Rum Profiler	7.88 KiB	7.88 KiB	0 B	0.00%	✅
Rum Recorder	21.21 KiB	21.21 KiB	0 B	0.00%	✅
Logs	54.31 KiB	54.31 KiB	0 B	0.00%	✅
Rum Slim	129.70 KiB	129.70 KiB	0 B	0.00%	✅
Worker	22.96 KiB	22.96 KiB	0 B	0.00%	✅

[datadog-prod-us1-3]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 76.47%
• Overall Coverage: 76.71% (+0.00%)

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