feat(mcp): add get_span_details tool #5139

Job	Run time
sdk-compat / Deno Runtime	1m 58s
typecheck / typecheck	6m 44s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 49s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	5m 0s
sdk-compat / Cloudflare Workers	2m 10s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	4m 31s
sdk-compat / Node.js 20.20 (ubuntu-latest)	1m 54s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 57s
sdk-compat / Bun Runtime	2m 3s
sdk-compat / Node.js 22.12 (ubuntu-latest)	1m 59s
units / packages / 🧪 Unit Tests: Packages (1, 1)	9m 7s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 59s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	2m 59s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	3m 56s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 58s
units / internal / 🧪 Unit Tests: Internal (2, 8)	1m 55s
units / internal / 🧪 Unit Tests: Internal (4, 8)	2m 6s
units / internal / 🧪 Unit Tests: Internal (1, 8)	1m 55s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	7m 44s
units / internal / 🧪 Unit Tests: Internal (3, 8)	2m 0s
units / internal / 🧪 Unit Tests: Internal (5, 8)	2m 6s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 54s
units / internal / 🧪 Unit Tests: Internal (7, 8)	1m 55s
units / internal / 🧪 Unit Tests: Internal (8, 8)	1m 59s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 20s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	9m 29s
units / internal / 🧪 Unit Tests: Internal (6, 8)	1m 51s
units / internal / 📊 Merge Reports	25s
units / packages / 📊 Merge Reports	23s
units / webapp / 📊 Merge Reports	43s
	1h 39m 49s

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