Initial commit — leak-hunt project complete

Five bugs identified and patched in retail Asheron's Call client:
- v3b: palette refcount over-increment (3-byte NOP at two sites)
- v5: RenderSurface PurgeResource no-op stub (vtable slot 2 thunk)
- v11: two dangling-pointer crash guards (NULL-check + reorder)
- v14: CEnvCell::Destroy ClipPlaneList leak (18-byte JMP to cleanup thunk)
- v22: unpacker stale-pointer SEH guard (whole-function __try/__except)

All five ship in leakfix.dll (117 KB, SHA d282f23c…) which is loaded
by acclient.exe at process start via PE import table patching by
tools/install_leakfix.py.

Controlled 15-client fleet soak: unpatched control died at 26h with
palette exhaustion; all 14 patched clients survived past that point
and reached ≥5-day uptime.

Residual ~15 MB/h growth traced to d3d9.dll's internal slab allocator
(260KB surface backing buffers retained after Release). See REPORT.md
§10 for the full investigation; conclusion is that it's unfixable from
outside d3d9.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

bin/heap_summary.cdb

@@ -0,0 +1,18 @@
+$$ heap_summary.cdb — run via: cdb -z <dump.dmp> -cf bin\heap_summary.cdb
+$$
+$$ One command per line. .sympath eats the rest of its line, so the path goes
+$$ on its own line. This avoids the -c semicolon-ambiguity hazard.
+
+.sympath C:\Users\acbot\leakhunt\pdb
+.symopt+ 0x40
+.reload /f acclient.exe
+
+$$ Heap summary — top-level overview, lightweight.
+.echo === !heap -s ===
+!heap -s
+
+$$ Per-heap allocation-size histogram, useful for tracking growth.
+.echo === !heap -stat -h 0 ===
+!heap -stat -h 0
+
+q