Rename FABRIC series: FABRIC.md->0, FABRIC-2.md->1, FABRIC-3.md->2, FABRIC-4.md unchanged

FABRIC.md -> FABRIC-0.md
FABRIC-2.md -> FABRIC-1.md
FABRIC-3.md -> FABRIC-2.md (the current/living document)
FABRIC-4.md unchanged (new #3 to follow separately)

Every cross-reference repo-wide updated to match, including doc-comment
citations inside kernel source (.c/.h) files -- done via an ordered
placeholder substitution (FABRIC-3.md->placeholder2, FABRIC-2.md->
placeholder1, FABRIC.md->placeholder0, then placeholders resolved to
final names) in a single pass per file to avoid double-shifting
already-renamed references.

One line in capsules/font.4th grew past the 64-char block-format limit
as a side effect of the longer filename; shortened it and reverified
with mkcapsule --lint (34/34 pass) before rebuilding.

Verified 3-arch boot to ok> (amd64/aarch64/riscv64, each in the
foreground) after the fix; logs and DoE CSVs from this session's
verification runs included per this repo's own audit-artifact
convention.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019YcT3H2PQeyujrzjqS3Var

src/starkernel/capsule/capsule_vm_physics.c

@@ -83,9 +83,9 @@ static vm_physics_node_t *vm_physics_head = (void *)0;
  * wasn't clamped (rate = amount / elapsed_ticks), rather than curve-fitting
  * a reconstructed trajectory against a synthetic time axis.
  *
- * Restated on the virtual tick (FABRIC.md item 2.1, 2026-08-04): this used
+ * Restated on the virtual tick (FABRIC-0.md item 2.1, 2026-08-04): this used
  * to be elapsed_us, wall-clock microseconds -- non-reproducible under TCG
- * per GAP-A1 (FABRIC.md §25.7.1). Now counts fleet_heartbeat_tick_count
+ * per GAP-A1 (FABRIC-0.md §25.7.1). Now counts fleet_heartbeat_tick_count
  * ticks, which is execution-paced (incremented once per vm_tick() call,
  * confirmed at vm_runtime.c:143). */
 typedef struct {
@@ -135,7 +135,7 @@ static VMFleetWindow fleet_window = { { { 0, 0, 0 } }, 0, 0, 0 };
  * via doe_log.c's per-VM heat CSV columns showing a dead-flat trajectory
  * across a full boot (VM-FLEET-ATTRACTOR-DESIGN-20260705.md rev f).
  *
- * UNVALIDATED after the ns-to-tick restatement (FABRIC.md item 2.1,
+ * UNVALIDATED after the ns-to-tick restatement (FABRIC-0.md item 2.1,
  * 2026-08-04): this value was calibrated against elapsed wall-clock
  * microseconds. Elapsed fleet-heartbeat *ticks* between touches is a
  * different quantity at a different scale, and the seed has not been
@@ -289,10 +289,10 @@ void vm_physics_touch(VMUuid vm_id)
 
     if (!target || !target->physics.is_live) return;
 
-    /* Restated on the virtual tick (FABRIC.md item 2.1, 2026-08-04): this
+    /* Restated on the virtual tick (FABRIC-0.md item 2.1, 2026-08-04): this
      * used to gate on target->physics.last_active_ns > 0 and scale by
      * elapsed wall-clock microseconds -- non-reproducible run to run under
-     * TCG (GAP-A1, FABRIC.md §25.7.1). fleet_heartbeat_tick_count is
+     * TCG (GAP-A1, FABRIC-0.md §25.7.1). fleet_heartbeat_tick_count is
      * execution-paced (vm_runtime.c:143), so elapsed_ticks is now a pure
      * function of the execution stream. `touched` replaces the old
      * `> 0` sentinel: tick 0 is a legitimate value for a genuine first
@@ -458,7 +458,7 @@ void vm_physics_tick(uint64_t now_ns)
 }
 
 /* Gated on STADIUM_CAPACITY_TICK, not HEARTBEAT_INFERENCE_FREQUENCY (fixed
- * 2026-08-15, FABRIC-2.md §12 Q5): fleet_heartbeat_tick_count is fed by
+ * 2026-08-15, FABRIC-1.md §12 Q5): fleet_heartbeat_tick_count is fed by
  * EVERY live VM's own vm_tick() (see the comment above this counter's
  * declaration), so it advances several times faster in wall-clock terms
  * than a single VM's own tick_count -- comparing it against