fix(injection): keep Rollup debug IDs in upload prefix

[jhssilva]

What does this change?

Fixes Rollup sourcemap uploads that can miss the entry bundle's debug ID when a later transform pushes the complete ddDebugId value outside Error Tracking's initial read.

• Runs Datadog's Rollup renderChunk injection with order: 'post', after normal transforms such as Terser.
• Places ddDebugId first in the injected source-code context.

Progressive debug-ID discovery is intentionally handled separately by the follow-up PR linked below, because it changes shared Error Tracking behavior for every bundler.

Related fixes:

• PR #487 fixes the esbuild artifact-readiness race.
• PR #489 adds progressive debug-ID discovery for all bundlers.

Tracking issue: RUM-18038

Validation

• Focused regression tests: 10/10 passed.
• Lint, full typechecking, integrity, and dependency checks passed.
• Static production builds and browser runtime registration passed for webpack, Vite, Rollup, esbuild, and Rspack.
• Live Rollup staging test: 4/4 debug IDs extracted before upload and 2/2 errors deobfuscated.
• Live webpack, Vite, and Rspack staging tests: all uploaded sourcemaps contained debug IDs and 2/2 errors deobfuscated for each bundler.
• Exact esbuild PR fix(error-tracking): wait for debug ID injection before sourcemap upload #487 package: 7/7 debug IDs extracted and 2/2 errors deobfuscated.

[jhssilva]

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