Migrate all repos into monorepo context folders

Bahn: aisupport, Analyse-O2C-C2S, awesome-bahn-mcp-servers, beam-mcp,
      Confluence_Bot, db-planet-mcp-server, O2C-Harness, project-audit,
      Projekt-KIQ-HP, teamlandkarte-mcp
Dhive: Jury-Voting
Privat: CV, NoteGraph (NOTE: NoteGraph needs complete redo after consolidation)
Shared: AI-Orchestrator, OrgMyLife, power_skills_and_more
Shared/references: symphony (read-only)

Bahn repos remain available as independent remotes - this monorepo
pulls them in via subtree, the originals are untouched.

privat/NoteGraph/ingestion/extraction/base.py

@@ -0,0 +1,27 @@
+"""Base protocol and data structures for text extraction."""
+
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Any, Protocol
+
+
+@dataclass
+class ExtractionResult:
+    """Result of extracting text from a document."""
+
+    text: str
+    source_file: Path
+    extraction_method: str  # "direct", "ocr", "mixed"
+    metadata: dict[str, Any] = field(default_factory=dict)
+
+
+class TextExtractor(Protocol):
+    """Protocol that all text extractors must implement."""
+
+    def can_handle(self, file_path: Path) -> bool:
+        """Return True if this extractor can process the given file."""
+        ...
+
+    def extract(self, file_path: Path) -> ExtractionResult:
+        """Extract text content from the file."""
+        ...