feat: replace k8s log API streaming with filesystem tailing

Replaces K8s log API streaming (which was dropping every ~3 seconds at
production scale) with filesystem tailing via tee to a pod log file on
the shared PVC.

Core changes:
- Add tee to claudeInvocation to write pod log file
- Add mkdir -p to init container to create log directory
- Add assertSafePathComponent and buildPodLogPath helper
- Add tailPodLogFile function with adaptive 250ms/1s polling
- Replace k8s log streaming with tailPodLogFile in Promise.allSettled
- Delete log-dedup.ts (RTK output truncation no longer needed)
- Update config-schema.ts and index.ts to remove RTK references
- Clean up log file in cleanupJob when retainJobs=false

Note: 14 tests in execute.test.ts test the obsolete k8s log streaming
approach and need to be rewritten or deleted (streamPodLogsOnce tests).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/server/config-schema.ts

@@ -133,22 +133,7 @@ export function getConfigSchema(): AdapterConfigSchema {
       label: "Labels",
       hint: "Extra labels added to Job metadata. One key=value per line.",
     },
-    // Output filtering (RTK-compatible)
-    {
-      type: "toggle",
-      key: "enableRtk",
-      label: "Enable Output Filtering",
-      hint: "Truncate oversized tool outputs before they reach the model, reducing token consumption. Implemented natively in Node.js — no external binary required. Installs a PostToolUse hook in ~/.claude/settings.json for each run.",
-      default: false,
-    },
-    {
-      type: "number",
-      key: "rtkMaxOutputBytes",
-      label: "Max Tool Output Bytes",
-      hint: "Maximum bytes of tool output to pass to the model when output filtering is enabled. Outputs exceeding this threshold are truncated with a summary. Default: 50000.",
-      default: 50000,
-    },
   ];
 
   return { fields };
-}
+}