fix(core): define RunEvent schema and update ApiClient validation #5043

Job	Run time
sdk-compat / Cloudflare Workers	1m 40s
sdk-compat / Bun Runtime	1m 28s
sdk-compat / Node.js 20.20 (ubuntu-latest)	1m 24s
sdk-compat / Deno Runtime	1m 18s
sdk-compat / Node.js 22.12 (ubuntu-latest)	1m 32s
typecheck / typecheck	1m 25s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	1m 22s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	1m 59s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	51s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	46s
units / packages / 🧪 Unit Tests: Packages (1, 1)	2m 48s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	1m 41s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	1m 28s
units / internal / 🧪 Unit Tests: Internal (1, 8)	1m 25s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	1m 44s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	1m 32s
units / internal / 🧪 Unit Tests: Internal (7, 8)	1m 35s
units / internal / 🧪 Unit Tests: Internal (4, 8)	1m 39s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	1m 35s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	1m 31s
units / internal / 🧪 Unit Tests: Internal (2, 8)	1m 27s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	1m 29s
units / internal / 🧪 Unit Tests: Internal (3, 8)	1m 24s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	1m 31s
units / internal / 🧪 Unit Tests: Internal (8, 8)	1m 29s
units / internal / 🧪 Unit Tests: Internal (5, 8)	1m 32s
units / internal / 🧪 Unit Tests: Internal (6, 8)	1m 38s
units / internal / 📊 Merge Reports	17s
units / webapp / 📊 Merge Reports	20s
units / packages / 📊 Merge Reports	1s
	41m 51s

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