ref(snapshot-tests): Invoke CLI subprocess uniformly and expand MCP fixture coverage

Replace direct module imports in the snapshot harness with CLI subprocess
invocations so every test exercises the real transport path. The resource
harness now connects via MCP SDK client instead of importing handler
modules directly.

- Remove invokeDirect path and shutdownAllSimulatorsExcept
- Add createTemporarySimulator/deleteSimulator/shutdownSimulator helpers
- Add output-parsers for extracting app paths, PIDs, simulator entries
- Resource harness uses StdioClientTransport + MCP Client
- Add normalizers for MCP process IDs and OSLog session arrays
- Remove CLI session-management fixtures (MCP-only tools)
- Add missing MCP fixtures for device, macos, simulator, swift-package
- Update all suites to use CLI-based harness patterns

Author: cameroncooke

src/snapshot-tests/__fixtures__/cli/coverage/get-file-coverage--success.txt

@@ -6,10 +6,11 @@
 
 File: example_projects/iOS_Calculator/CalculatorAppPackage/Sources/CalculatorAppFeature/CalculatorService.swift
 
-ℹ️ Coverage: 83.1% (157/189 lines)
+ℹ️ Coverage: 77.8% (147/189 lines)
 
-🔴 Not Covered (7 functions, 22 lines)
+🔴 Not Covered (8 functions, 27 lines)
    L159  CalculatorService.deleteLastDigit() -- 0/16 lines
+   L178  CalculatorService.setError(_:) -- 0/5 lines
    L58  implicit closure #2 in CalculatorService.inputNumber(_:) -- 0/1 lines
    L98  implicit closure #3 in CalculatorService.calculate() -- 0/1 lines
    L99  implicit closure #4 in CalculatorService.calculate() -- 0/1 lines
@@ -18,12 +19,12 @@ File: example_projects/iOS_Calculator/CalculatorAppPackage/Sources/CalculatorApp
    L214  implicit closure #4 in CalculatorService.formatNumber(_:) -- 0/1 lines
 
 🟡 Partial Coverage (4 functions)
+   L63  CalculatorService.inputDecimal() -- 71.4% (10/14 lines)
    L184  CalculatorService.updateExpressionDisplay() -- 80.0% (8/10 lines)
+   L93  CalculatorService.calculate() -- 84.2% (32/38 lines)
    L195  CalculatorService.formatNumber(_:) -- 85.7% (18/21 lines)
-   L93  CalculatorService.calculate() -- 89.5% (34/38 lines)
-   L63  CalculatorService.inputDecimal() -- 92.9% (13/14 lines)
 
-🟢 Full Coverage (28 functions) -- all at 100%
+🟢 Full Coverage (27 functions) -- all at 100%
 
 Next steps:
 1. View overall coverage: xcodebuildmcp coverage get-coverage-report --xcresult-path "<TMPDIR>/TestResults.xcresult"

src/snapshot-tests/__fixtures__/cli/debugging/attach--success-continue.txt

@@ -7,6 +7,6 @@
   └ Execution: Execution is running. App is responsive to UI interaction.
 
 Next steps:
-1. Add a breakpoint: debug_breakpoint_add({ debugSessionId: "<UUID>", file: "...", line: 123 })
-2. Continue execution: debug_continue({ debugSessionId: "<UUID>" })
-3. Show call stack: debug_stack({ debugSessionId: "<UUID>" })
+1. Add a breakpoint: xcodebuildmcp debugging add-breakpoint --debug-session-id "<UUID>" --file "..." --line "123"
+2. Continue execution: xcodebuildmcp debugging continue --debug-session-id "<UUID>"
+3. Show call stack: xcodebuildmcp debugging stack --debug-session-id "<UUID>"

src/snapshot-tests/__fixtures__/cli/debugging/attach--success.txt

@@ -7,6 +7,6 @@
   └ Execution: Execution is paused. Use debug_continue to resume before UI automation.
 
 Next steps:
-1. Add a breakpoint: debug_breakpoint_add({ debugSessionId: "<UUID>", file: "...", line: 123 })
-2. Continue execution: debug_continue({ debugSessionId: "<UUID>" })
-3. Show call stack: debug_stack({ debugSessionId: "<UUID>" })
+1. Add a breakpoint: xcodebuildmcp debugging add-breakpoint --debug-session-id "<UUID>" --file "..." --line "123"
+2. Continue execution: xcodebuildmcp debugging continue --debug-session-id "<UUID>"
+3. Show call stack: xcodebuildmcp debugging stack --debug-session-id "<UUID>"

src/snapshot-tests/__fixtures__/cli/device/build-and-run--error-wrong-scheme.txt

@@ -0,0 +1,16 @@
+
+🚀 Build & Run
+
+   Scheme: NONEXISTENT
+   Workspace: example_projects/iOS_Calculator/CalculatorApp.xcworkspace
+   Configuration: Debug
+   Platform: iOS
+   Device: <DEVICE> (<UUID>)
+   Derived Data: <HOME>/Library/Developer/XcodeBuildMCP/DerivedData
+
+Errors (1):
+
+  ✗ The workspace named "CalculatorApp" does not contain a scheme named "NONEXISTENT". The "-list" option can be used to find the names of the schemes in the workspace.
+
+❌ Build failed. (⏱️ <DURATION>)
+  └ Build Logs: <HOME>/Library/Developer/XcodeBuildMCP/logs/build_run_device_<TIMESTAMP>_pid<PID>.log

src/snapshot-tests/__fixtures__/cli/device/test--failure.txt

@@ -7,6 +7,15 @@
    Device: <DEVICE> (<UUID>)
    Derived Data: <HOME>/Library/Developer/XcodeBuildMCP/DerivedData
 
+Discovered 52 test(s):
+   CalculatorAppFeatureTests/CalculatorBasicTests/testClear
+   CalculatorAppFeatureTests/CalculatorBasicTests/testInitialState
+   CalculatorAppFeatureTests/CalculatorBasicTests/testIntentionalFailure
+   CalculatorAppFeatureTests/CalculatorIntegrationTests/testChainCalculations
+   CalculatorAppFeatureTests/CalculatorIntegrationTests/testComplexCalculation
+   CalculatorAppFeatureTests/CalculatorIntegrationTests/testExpressionDisplay
+   (...and 46 more)
+
 CalculatorAppTests
   ✗ testCalculatorServiceFailure:
       - XCTAssertEqual failed: ("0") is not equal to ("999") - This test should fail - display should be 0, not 999
@@ -17,5 +26,5 @@ IntentionalFailureTests
       - XCTAssertTrue failed - This test should fail to verify error reporting
         example_projects/iOS_Calculator/CalculatorAppTests/CalculatorAppTests.swift:286
 
-❌ 2 tests failed, 21 passed, 0 skipped (⏱️ <DURATION>)
+❌ <FAIL_COUNT> tests failed, <PASS_COUNT> passed, <SKIP_COUNT> skipped (⏱️ <DURATION>)
   └ Build Logs: <HOME>/Library/Developer/XcodeBuildMCP/logs/test_device_<TIMESTAMP>_pid<PID>.log

src/snapshot-tests/__fixtures__/cli/device/test--success.txt

@@ -9,5 +9,8 @@
    Selective Testing:
      CalculatorAppTests/CalculatorAppTests/testAddition
 
+Discovered 1 test(s):
+   CalculatorAppTests/CalculatorAppTests/testAddition
+
 ✅ 1 test passed, 0 skipped (⏱️ <DURATION>)
   └ Build Logs: <HOME>/Library/Developer/XcodeBuildMCP/logs/test_device_<TIMESTAMP>_pid<PID>.log