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/transaction-boundary.test.ts

@@ -0,0 +1,54 @@
+/**
+ * A3 regression: Transaction boundary — repos use (tx?.db ?? this.db)
+ * Bug: EventStore passed _tx to repos, but repos ignored it (always used this.db).
+ * Fix: all repos use (tx?.db ?? this.db).prepare(...) and TransactionHandle has db field.
+ */
+
+import { describe, it, expect } from 'bun:test'
+import { readFileSync, readdirSync } from 'fs'
+import { join } from 'path'
+
+describe('A3: Transaction boundary fix', () => {
+  const repos_dir = join(import.meta.dir, '..', '..', 'src', 'storage', 'repositories')
+
+  it('TransactionHandle interface includes db field', () => {
+    const contracts_src = readFileSync(
+      join(import.meta.dir, '..', '..', '..', 'contracts', 'src', 'task.ts'),
+      'utf-8'
+    )
+    expect(contracts_src).toMatch(/db\s*\?\s*:/)
+  })
+
+  it('core CRUD methods in repositories use (tx?.db ?? this.db) pattern', () => {
+    const repo_files = readdirSync(repos_dir).filter(f => f.endsWith('.ts') && !f.endsWith('.d.ts'))
+
+    for (const file of repo_files) {
+      const src = readFileSync(join(repos_dir, file), 'utf-8')
+
+      const crud_methods = ['async get(', 'async insert(', 'async update(']
+      for (const method_sig of crud_methods) {
+        const idx = src.indexOf(method_sig)
+        if (idx === -1) continue
+
+        const method_body = src.slice(idx, src.indexOf('\n  }', idx) + 4)
+        if (method_body.includes('this.db.prepare')) {
+          expect(method_body).toContain('tx?.db')
+        }
+      }
+    }
+  })
+
+  it('EventStore passes _tx to repository calls in project()', () => {
+    const event_store_src = readFileSync(
+      join(import.meta.dir, '..', '..', 'src', 'events', 'EventStore.ts'),
+      'utf-8'
+    )
+
+    const project_method = event_store_src.match(/project\s*\([^)]*\)[^{]*\{/s)
+    expect(project_method).not.toBeNull()
+
+    const repo_calls = event_store_src.match(/\?\.(?:insert|update|get)\([^)]*,\s*_tx\s*\)/g)
+    expect(repo_calls).not.toBeNull()
+    expect(repo_calls!.length).toBeGreaterThan(0)
+  })
+})