Add skip_prefilter option to control generator

Local LLM prefilter (llama3.2 3B) was incorrectly skipping annex chunks
that contain concrete requirements. Added skip_prefilter flag to bypass
the local pre-filter and send all chunks directly to Anthropic API.

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

backend-compliance/compliance/services/control_generator.py

@@ -385,6 +385,7 @@ class GeneratorConfig(BaseModel):
     dry_run: bool = False
     existing_job_id: Optional[str] = None  # If set, reuse this job instead of creating a new one
     regulation_filter: Optional[List[str]] = None  # Only process chunks matching these regulation_code prefixes
+    skip_prefilter: bool = False  # If True, skip local LLM pre-filter (send all chunks to API)
 
 
 @dataclass
@@ -1886,7 +1887,7 @@ Kategorien: {CATEGORY_LIST_STR}"""
                         self._update_job(job_id, result)
 
                     # Stage 1.5: Local LLM pre-filter — skip chunks without requirements
-                    if not config.dry_run:
+                    if not config.dry_run and not config.skip_prefilter:
                         is_relevant, prefilter_reason = await _prefilter_chunk(chunk.text)
                         if not is_relevant:
                             chunks_skipped_prefilter += 1