feat(chunks): aggiunge ChunkerConfig dataclass

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

chunks/config.py

@@ -0,0 +1,24 @@
+from __future__ import annotations
+from dataclasses import dataclass, field
+
+
+@dataclass
+class ChunkerConfig:
+    max_chars: int = 1200
+    min_chars: int = 80
+    target_chars: int = 800
+    context_depth: int = 3
+    skip_headings: set[str] = field(default_factory=lambda: {
+        "indice",
+        "sommario",
+        "bibliografia",
+        "ringraziamenti",
+        "abbreviazioni",
+    })
+    skip_pre_heading: bool = True
+    merge_short: bool = True
+    atomic_types: set[str] = field(default_factory=lambda: {
+        "table", "code", "list", "math", "html",
+    })
+    fail_on_broken_fence: bool = True
+    fail_on_content_loss: bool = False

tests/chunks/test_config.py

@@ -0,0 +1,29 @@
+from chunks.config import ChunkerConfig
+
+
+def test_default_values():
+    c = ChunkerConfig()
+    assert c.max_chars == 1200
+    assert c.min_chars == 80
+    assert c.target_chars == 800
+    assert c.context_depth == 3
+    assert "indice" in c.skip_headings
+    assert c.skip_pre_heading is True
+    assert c.merge_short is True
+    assert "table" in c.atomic_types
+    assert "code" in c.atomic_types
+
+
+def test_custom_values():
+    c = ChunkerConfig(max_chars=2000, min_chars=100, context_depth=2)
+    assert c.max_chars == 2000
+    assert c.min_chars == 100
+    assert c.context_depth == 2
+
+
+def test_skip_headings_case_insensitive_check():
+    c = ChunkerConfig()
+    skip_lower = {h.lower() for h in c.skip_headings}
+    assert "indice" in skip_lower
+    assert "sommario" in skip_lower
+    assert "bibliografia" in skip_lower