release(v13.0.1): bump version + CHANGELOG + stubs

[satwareAG-ironMike]

Release artifact preparation for v13.0.1

Changes

File	Change
VERSION.txt	13.0.0 -> 13.0.1
stubs/firebird-stubs.php	@version 13.0.0 -> @version 13.0.1
stubs/firebird-classes.php	@version 13.0.0 -> @version 13.0.1
stubs/pdo-fbird-stubs.php	@version 13.0.0 -> @version 13.0.1
CHANGELOG.md	[13.0.1] section with all fixes, packaging, behavior changes

v13.0.1 summary

15 audit bugs fixed:

Issue	Fix	PR
#512-#514	IStatus leaks in fb_blob/transaction/service	#536
#515	IStatus leak in fbm_call0/fbm_call1	#529
#516	BLOB ID format 13->17 char + 32-bit truncation + legacy compat	#533, #555
#517	PDO BLOB leak	#535
#518	isDirty() -> statusHasError() (FB3 compat)	#528
#519	Malformed SPB for service timeout	#534
#520+#521	IStatus leaks on exception paths	#542, #548, #552
#522	fbird_fetch_object() ctor_args	#543
#523/#541	Sentinel head pattern documented (not a bug)	#553
#524	Dead condition in blob_echo	#537
#525	fbird_blob_export() zval refcount	#543
#526	PDO array_id + IStatus leak in fb_array.hpp	#544
#549	zend_symtable_str_find_ptr bug	#552
#550	.deb .ini naming + phpenmod	#551

Packaging additions: #481-#493, #509-#511 (Debian packaging, PIE, CI workflows, docs)

Behavior changes (documented in CHANGELOG):

• bug(transaction): isDirty() misuse - transactions silently fail on FB3 (verified against own codebase comment) #518: isDirty() -> hasError() (FB3 exceptions suppressed)
• bug(pdo): Malformed SPB for service timeout - buffer overread + timeout always 0 #519: Service query timeout 0 -> 10 seconds
• bug(result): fbird_fetch_object() ignores ctor_args parameter #522: fbird_fetch_object() now passes ctor_args
• bug(blob): Inconsistent BLOB ID format between procedural (13-char) and OOP/PDO (17-char) APIs #516: BLOB ID format 13 -> 17 char (legacy compat preserved)

Verification

• scripts/check-version-stamps.sh PASS
• All stubs @Version tags match VERSION.txt
• CHANGELOG follows Keep a Changelog format