fix(scraper): implement PDF parsing for TotalEnergies instead of always falling back (#60)

Replace stub _parse_pdf() that returned empty list with proper pdfplumber-based parsing.
Now correctly extracts pricing from both Essentielle and Verte Fixe PDFs, parsing
side-by-side table formats with regex patterns for BASE and HC/HP offers. Updates tests
to verify PDF parsing works and fallback is not used.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Clément VALENTIN <[email protected]>
Co-authored-by: Claude <[email protected]>

Author: 3 people

apps/api/pyproject.toml

@@ -65,3 +65,9 @@ python_version = "3.11"
 warn_return_any = true
 warn_unused_configs = true
 disallow_untyped_defs = true
+
+[dependency-groups]
+dev = [
+    "pytest>=8.4.2",
+    "pytest-asyncio>=1.2.0",
+]