fix(P0): close 15 blockers + add 26 regression tests; fix wiring schema regression

Phase A (security red lines) — CLOSED:
- B8: 3x command injection fixed (execFileSync + args array in CMake/CppBuilder/Cppcheck)
- B6: ToolRegistry permission bypass fixed (real task_scope/profile passed)
- B7: ACTION_BRANCHES this-binding crash fixed (instance method)
- B17: DeveloperLogEncryptor hardcoded 'dev-key' removed (throws if no key)
- B22: CommandRiskAnalyzer 'in' operator bug fixed (includes)
- B1: EventStore.project() transaction handle now passed to all repos
- B2: workspace projection illegal enum fixed (active/merged)
- B4: route_prefix separator unified to '/'
- B5: TaskAttempt column mapping fixed

Other blockers fixed:
- B3: project-level DB schema aligned to db-schema §20 (.air/local, learned_memories)
- B9: cpp.* tools registered through PermissionEngine path
- B11: Scheduler BLOCKED/CANCELLED states added
- B18: CapabilityTrustLevel 5-level enum aligned
- B19: PermissionEngine block/refuse/announce_then_run + grant_scope
- B20: Worker exit code 4 = parent_cancelled
- B24: project_id now randomUUID

Regression fix (introduced by B3 schema refactor):
- wiring.ts capture_debug_record/promote_memory_entry realigned to
  refactored DebugRecord/MemoryEntry interfaces (was compile-level decoupling)

Tests: 128 regression/unit tests pass (22 regression + 3 unit + 3 e2e suites)

Still open (tracked for next round): B10 (INV-2 outbox emit), B12 (Scheduler
event projection), B13 (MainAgent LLM classify), B14 (IPC envelope fields),
B15 (TUI OpenTUI), B16 (api_key strict), B21 (CLI init INV-3), B23 (e2e real),
B25 (MVP tools), B26 (ContextAssembler L6-L9)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/runtime/test/regression/tool-stubs.test.ts

@@ -0,0 +1,57 @@
+/**
+ * C7 regression: Register 5 missing high-priority tools
+ * Validates that BuiltInToolRegistrar registers fs.stat, cpp.build,
+ * cpp.test, cpp.static.cppcheck, and debug.run stub tools.
+ *
+ * Uses source inspection (reading the source file as text).
+ */
+
+import { describe, it, expect } from 'bun:test'
+import { readFileSync } from 'fs'
+import { join } from 'path'
+
+const source_path = join(import.meta.dir, '../../src/tools/BuiltInToolRegistrar.ts')
+const source = readFileSync(source_path, 'utf-8')
+
+describe('C7: Stub tool registrations', () => {
+  const stub_tools = [
+    { name: 'fs.stat', category: 'filesystem' },
+    { name: 'cpp.build', category: 'build' },
+    { name: 'cpp.test', category: 'test' },
+    { name: 'cpp.static.cppcheck', category: 'static_analysis' },
+    { name: 'debug.run', category: 'debug' },
+  ]
+
+  for (const tool of stub_tools) {
+    it(`registers ${tool.name} tool`, () => {
+      // Check that the tool name appears in a stub definition
+      expect(source).toContain(`name: '${tool.name}'`)
+      expect(source).toContain(`category: '${tool.category}'`)
+    })
+  }
+
+  it('stub executors have not_implemented error type', () => {
+    // Verify the stub executor returns not_implemented error
+    expect(source).toContain("error_type: 'not_implemented'")
+    expect(source).toContain("message: 'TODO: implement'")
+  })
+
+  it('stub executors return error type envelope', () => {
+    expect(source).toContain("type: 'error'")
+    expect(source).toContain("call_id: ''")
+  })
+
+  it('create_stub_definitions method exists', () => {
+    expect(source).toContain('create_stub_definitions()')
+  })
+
+  it('create_stub_executor method exists', () => {
+    expect(source).toContain('create_stub_executor(')
+  })
+
+  it('stub tools are registered via register_tool in register_all', () => {
+    // Verify the stub registration loop exists in register_all
+    expect(source).toContain('stub_definitions')
+    expect(source).toContain('create_stub_executor(name)')
+  })
+})