feat(mcp): add get_span_details tool #5135

Job	Run time
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 45s
typecheck / typecheck	6m 26s
sdk-compat / Node.js 22.12 (ubuntu-latest)	1m 57s
sdk-compat / Deno Runtime	2m 3s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	4m 8s
sdk-compat / Cloudflare Workers	2m 18s
sdk-compat / Node.js 20.20 (ubuntu-latest)	2m 10s
sdk-compat / Bun Runtime	2m 1s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	4m 8s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 55s
units / packages / 🧪 Unit Tests: Packages (1, 1)	8m 52s
units / internal / 🧪 Unit Tests: Internal (8, 8)	2m 36s
units / internal / 🧪 Unit Tests: Internal (5, 8)	5m 49s
units / internal / 🧪 Unit Tests: Internal (6, 8)	6m 5s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	4m 7s
units / internal / 🧪 Unit Tests: Internal (4, 8)	6m 4s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	6m 38s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 10s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 43s
units / internal / 🧪 Unit Tests: Internal (3, 8)	9m 6s
units / internal / 🧪 Unit Tests: Internal (1, 8)	6m 26s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	6m 13s
units / internal / 🧪 Unit Tests: Internal (7, 8)	5m 36s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	6m 2s
units / internal / 🧪 Unit Tests: Internal (2, 8)	12m 43s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	8m 2s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	2m 40s
units / webapp / 📊 Merge Reports	50s
units / packages / 📊 Merge Reports	23s
units / internal / 📊 Merge Reports	25s
	2h 14m 21s

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