feat(prompts): implement Phase 3 - Resolver Engine (FR-3)

Implement deterministic multi-space resolution with configurable search order.

Core Features:
- ResolutionContext and ResolutionResult for tracking resolution state
- MultiSpaceResolutionStrategy implementing FR-3.1 search order:
  1. Local InformationSpace
  2. Explicitly included InformationSpaces
  3. Default InformationSpace
  4. Team/Shared InformationSpace
- PromptResolver with macro resolution logic
- ContextCompiler for assembling resolved prompts
- ResolutionConfig for configurable resolution behavior

Resolution Behavior:
- Required macros fail if not found (FR-3.2)
- Optional macros resolve to empty (FR-3.3)
- Generate macros detected for deferred execution (FR-3.4)
- Deterministic search order with duplicate removal
- Partial compilation support for debugging

Tests (31 passing):
- 14 strategy tests (search order, duplicates, priority)
- 9 resolver tests (required, optional, generate, multi-space)
- 8 compiler tests (substitution, dependencies, digests)

Implements:
- FR-3.1: Deterministic resolution order
- FR-3.2: Required macro validation
- FR-3.3: Optional macro fallback
- FR-3.4: Generate macro detection
- FR-3.5: Max generation depth configuration

Files Created:
- markitect/prompts/resolver/models.py
- markitect/prompts/resolver/strategy.py
- markitect/prompts/resolver/resolver.py
- markitect/prompts/resolver/compiler.py
- migrations/prompts/002_create_resolution_config.sql
- tests/unit/prompts/test_resolution_strategy.py
- tests/unit/prompts/test_prompt_resolver.py
- tests/unit/prompts/test_context_compiler.py

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

markitect/prompts/resolver/__init__.py

@@ -0,0 +1,31 @@
+"""
+Resolution engine for Prompt Dependency Resolution.
+
+This package provides the core resolution logic for resolving ContentMacros
+across multiple InformationSpaces with deterministic search order.
+"""
+
+from markitect.prompts.resolver.models import (
+    ResolutionContext,
+    ResolutionResult,
+    ResolutionError,
+    ResolvedMacro,
+)
+from markitect.prompts.resolver.strategy import (
+    ResolutionStrategy,
+    MultiSpaceResolutionStrategy,
+)
+from markitect.prompts.resolver.resolver import PromptResolver
+from markitect.prompts.resolver.compiler import ContextCompiler, CompiledPrompt
+
+__all__ = [
+    "ResolutionContext",
+    "ResolutionResult",
+    "ResolutionError",
+    "ResolvedMacro",
+    "ResolutionStrategy",
+    "MultiSpaceResolutionStrategy",
+    "PromptResolver",
+    "ContextCompiler",
+    "CompiledPrompt",
+]