feat: raw accept - incoming/ als abgeleiteter Rohablage-Eingang (schliesst #58)

Files changed:
- .gitignore
- CHANGES.md
- README.md
- VERSION
- docs/pipeline-rationale.md
- instructions/bootstrap.md
- instructions/wiki-ingest/SKILL.md
- raw/CONTRACT.md
- tools/CONTRACT.md
- tools/chemenu/cli.py
- tools/chemenu/commands/dist_cmd.py
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/commands/raw_cmd.py
- tools/chemenu/tests/test_dist_cmd.py
- tools/chemenu/tests/test_docs_verify.py
- tools/chemenu/tests/test_raw_cmd.py

tools/chemenu/commands/dist_cmd.py

@@ -135,6 +135,10 @@ INSTRUCTIONS_EXCLUDE_DIRS = {"dev"}
 
 # Fixed by raw/CONTRACT.md's routing table, unlike kb/'s areas (which are
 # organic - see kb/CONTRACT.md - so `export` does not manufacture them).
+# `docs verify` (check_raw_subdirs) holds the table to this tuple in both
+# directions, and `incoming/` (raw/CONTRACT.md "Getting a file in",
+# raw_cmd.py) mirrors it as the set of type subdirectories a human may drop a
+# file into - so this is the one place all three read the list from.
 RAW_SUBDIRS = ("articles", "documents", "notes", "assets")
 
 # Stage contracts that are not collections and carry no pages: copied as a
@@ -414,6 +418,12 @@ def build_plan(origin: Optional[Origin] = None) -> dict[str, PlannedFile]:
 
     for sub in RAW_SUBDIRS:
         plan[f"raw/{sub}/.gitkeep"] = PlannedFile("")
+        # `incoming/` mirrors raw/'s type subdirectories (raw/CONTRACT.md
+        # "Getting a file in") - seeded the same way, though `.gitignore`
+        # (also exported, see ROOT_FILES) excludes the whole directory again
+        # once the instance is a git repo, which is why bootstrap.md re-creates
+        # it for a plain clone that never had this export step at all.
+        plan[f"incoming/{sub}/.gitkeep"] = PlannedFile("")
 
     plan["kb/log.md"] = PlannedFile((DIST_TEMPLATES_DIR / "log.md").read_text(encoding="utf-8"))
     plan["CHANGES.md"] = PlannedFile((DIST_TEMPLATES_DIR / "CHANGES.md").read_text(encoding="utf-8"))