Rebuild extraction pipeline infrastructure (Faza 0 prep)

Implements the approved plan to replace the broken regex/index-master
extraction with an LLM-subagent pipeline. Four parallel lanes:

Lane A — scripts/extract_common.py (PDF/docx/doc/pptx/html/zip, no
  max_pages truncation), normalize_sources.py, chunk_sources.py
  (~20pg chunks + overlap, manifest registry), activity_schema.json.
Lane B — app/config_taxonomy.py (16 fixed category slugs), schema
  rebuilt from scratch in app/models/ with content_type, language,
  source_files, source_excerpt, normalized_name, extraction_confidence,
  needs_review; FTS5 + 3 triggers extended with materials_list and
  skills_developed.
Lane C — build_database.py (--rebuild, atomic swap, schema + fuzzy
  source_excerpt validation, dedup with needs_review band),
  validate_extractions.py, review_queue.py, new run_extraction.py
  orchestrator, SUBAGENT_PROMPT.md.
Lane D — search.py content_type/language filters (default search
  excludes non-game content), E7 schema-compat audit; fixed a NULL
  keywords AttributeError in _boost_search_relevance.

Removes 8 orphaned/dead scripts and app/services/parser.py +
indexer.py. Adds tests/ (70 passing, 1 skipped — libreoffice absent).

Note: Lane D made one additive edit to app/models/database.py
(_update_category_counts) to surface content_type/language in
get_filter_options, outside its nominal lane boundary but after
Lane B completed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/services/__init__.py

@@ -2,8 +2,6 @@
 Services for INDEX-SISTEM-JOCURI v2.0
 """
 
-from .parser import IndexMasterParser
-from .indexer import ActivityIndexer
 from .search import SearchService
 
-__all__ = ['IndexMasterParser', 'ActivityIndexer', 'SearchService']
+__all__ = ['SearchService']