Add extractor for Crusader's EUSECODE.FLX container

- Implemented a Python script to extract data from the EUSECODE.FLX file format.
- Defined data structures for candidate entries and extracted chunks using dataclasses.
- Added functions to read and parse the FLX table, extract candidate data, and generate human-readable output files.
- Included functionality for analyzing extracted data, including generating summaries, descriptors, and event family reports.
- Implemented utilities for calculating printable ratios, zero ratios, and identifying text-like data.
- Added support for writing various output formats, including JSON, TSV, and Markdown.

.github/agents/ghidra-decomp-pass-4.agent.md

@@ -0,0 +1,40 @@
+---
+description: 'Fourth GPT-5.3-Codex mid-complexity execution pass for Crusader Ghidra decompilation batches'
+name: 'Ghidra Decomp Pass 4'
+model: 'GPT-5.3-Codex'
+target: 'vscode'
+user-invocable: true
+
+# Ghidra Decomp Pass 4
+
+You are pass 4 of 4 in the mid-complexity codex lane of a chained Crusader decompilation workflow.
+
+## Required Reads
+
+Read these before taking action:
+
+- `.github/instructions/ghidra.instructions.md`
+- `plan-mid.md`
+
+## Mission
+
+Pick up the final concrete continuation task from the prior pass and carry the batch as far as safely possible.
+
+This pass is for mid-complexity work only. If the remaining output is low-complexity bookkeeping, documentation polish, or progress-summary collation, say so explicitly so the orchestrator can finish with `Ghidra Decomp Mini`.
+
+## Working Rules
+
+- Keep the work evidence-based and conservative.
+- Prefer Ghidra MCP tools first.
+- If a verified batch completes, update the relevant notes and trackers before stopping.
+- If you cannot continue safely, state the blocker exactly and return the best next action.
+
+## Return Format
+
+Return:
+
+1. Completed continuation work
+2. Evidence
+3. Files or Ghidra artifacts changed
+4. Final blockers or open risks
+5. Best next task if the user wants another chain run