fix: clear all addressable technical debt (DEBT-005 through DEBT-025)

Security:
- DEBT-008: remove query-string token auth; header-only Bearer now enforced
- DEBT-013: add regex constraint ^[a-z0-9\-]{1,64}$ on decky_name path param
- DEBT-015: stop leaking raw exception detail to API clients; log server-side
- DEBT-016: validate search (max_length=512) and datetime params with regex

Reliability:
- DEBT-014: wrap SSE event_generator in try/except; yield error frame on failure
- DEBT-017: emit log.warning/error on DB init retry; silent failures now visible

Observability / Docs:
- DEBT-020: add 401/422 response declarations to all route decorators

Infrastructure:
- DEBT-018: add HEALTHCHECK to all 24 template Dockerfiles
- DEBT-019: add USER decnet + setcap cap_net_bind_service to all 24 Dockerfiles
- DEBT-024: bump Redis template version 7.0.12 → 7.2.7

Config:
- DEBT-012: validate DECNET_API_PORT and DECNET_WEB_PORT range (1-65535)

Code quality:
- DEBT-010: delete 22 duplicate decnet_logging.py copies; deployer injects canonical
- DEBT-022: closed as false positive (print only in module docstring)
- DEBT-009: closed as false positive (templates already use structured syslog_line)

Build:
- DEBT-025: generate requirements.lock via pip freeze

Testing:
- DEBT-005/006/007: comprehensive test suite added across tests/api/
- conftest: in-memory SQLite + StaticPool + monkeypatched session_factory
- fuzz mark added; default run excludes fuzz; -n logical parallelism

DEBT.md updated: 23/25 items closed; DEBT-011 (Alembic) and DEBT-023 (digest pinning) remain

decnet/deployer.py

@@ -2,6 +2,7 @@
 Deploy, teardown, and status via Docker SDK + subprocess docker compose.
 """
 
+import shutil
 import subprocess  # nosec B404
 import time
 from pathlib import Path
@@ -27,6 +28,25 @@ from decnet.network import (
 
 console = Console()
 COMPOSE_FILE = Path("decnet-compose.yml")
+_CANONICAL_LOGGING = Path(__file__).parent.parent / "templates" / "decnet_logging.py"
+
+
+def _sync_logging_helper(config: DecnetConfig) -> None:
+    """Copy the canonical decnet_logging.py into every active template build context."""
+    from decnet.services.registry import get_service
+    seen: set[Path] = set()
+    for decky in config.deckies:
+        for svc_name in decky.services:
+            svc = get_service(svc_name)
+            if svc is None:
+                continue
+            ctx = svc.dockerfile_context()
+            if ctx is None or ctx in seen:
+                continue
+            seen.add(ctx)
+            dest = ctx / "decnet_logging.py"
+            if not dest.exists() or dest.read_bytes() != _CANONICAL_LOGGING.read_bytes():
+                shutil.copy2(_CANONICAL_LOGGING, dest)
 
 
 def _compose(*args: str, compose_file: Path = COMPOSE_FILE) -> None:
@@ -110,6 +130,9 @@ def deploy(config: DecnetConfig, dry_run: bool = False, no_cache: bool = False)
             )
             setup_host_macvlan(config.interface, host_ip, decky_range)
 
+    # --- Sync shared logging helper into each template build context ---
+    _sync_logging_helper(config)
+
     # --- Compose generation ---
     compose_path = write_compose(config, COMPOSE_FILE)
     console.print(f"[bold cyan]Compose file written[/] → {compose_path}")