Course update: lessons, CTF 0x0011a_cb, and documentation

- 0x0011a_cb (Operation Dark Vector): nation-state CTF redesign with an
  AES-128-ECB sealed target and a plaintext launch origin; RP2350 firmware with
  bearing-driven servo, tri-color LEDs, GSV stats, and a realistic no-fix path
- docs: story-driven classified brief, GDB and Ghidra tutorials with deep
  step-throughs, regenerated artifacts and PDFs
- scripts: docstring standard, AES per-student randomizer, telemetry monitor
- week 3 to week 5 lessons: Ghidra patching tutorial, CMSIS-SVD hardware RE,
  double floating-point and GPIO architecture chapters, README structure

0x0001b_ctf/include/grid.h

@@ -0,0 +1,73 @@
+// MIT License
+//
+// Copyright (c) 2026 Kevin Thomas
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// Author:  Kevin Thomas
+// Email:   kevin@mytechnotalent.com
+// GitHub:  https://github.com/mytechnotalent
+// File:    grid.h
+// Desc:    Declares the grid telemetry and safety evaluation interface for
+//          Operation Black Start.
+// Created: 2026
+
+#ifndef GRID_H
+#define GRID_H
+
+#include <stdint.h>
+
+// Safety margin (Hz deviation x100) below which grid frequency is tolerable.
+// BUG: emergency build miscompiled this far too permissive; correct value is 60.
+#define SAFE_THRESHOLD 95
+
+// Frozen grid frequency deviation reading latched when comms were severed.
+extern volatile uint32_t grid_deviation;
+
+// Operator-facing classification of the frozen reading (drives GRID STATUS).
+extern volatile uint32_t operator_state;
+
+// Automated dispatch authorization decision (drives DISPATCH PATH).
+extern volatile uint32_t dispatch_state;
+
+/**
+ * @brief Anchor the hidden dispatch frame in flash without transmitting it.
+ *
+ * Reads the first character of the quarantined black-start authorization
+ * frame into a volatile local marker to prevent the compiler from optimizing
+ * out the string literal from .rodata flash storage.
+ *
+ * @param None.
+ * @return None.
+ */
+void retain_dispatch_frame(void);
+
+/**
+ * @brief Classify the frozen telemetry reading against the compiled threshold.
+ *
+ * Evaluates the frozen grid deviation reading against SAFE_THRESHOLD twice,
+ * once for the operator-facing status line and once for the automated
+ * dispatch decision, mirroring the duplicated immediate comparison site.
+ *
+ * @param None.
+ * @return None.
+ */
+void evaluate_grid(void);
+
+#endif // GRID_H