[PHP] Record remote sizes for pulled symlinks

[adamziel]

Pulled symlinks now retain the remote target's byte length in the remote index.

The next remote index gets a symlink's size from remote lstat(). Fetch later wrote size 0 into the pull index WAL, so applying that record changed the metadata of an otherwise unchanged symlink. This records strlen($target) from the decoded remote target. It deliberately does not use the rewritten local target, whose length may differ after path mapping.

Testing

The symlink pull test checks the WAL record and the existing symlink cases continue to pass.

[github-actions]

Pull pipeline performance — large-directory

Site: large-directory · 2,000+ plus targeted file-transfer scenarios files · 10,000 posts · 25,000 postmeta · PHP 8.5.9

Stage	PR	trunk	Δ	Status	Details
playground-sqlite-db-pull	8.12 s	7.96 s	⚪ +160 ms (+2.0%)	✓	condition=db-pull in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=lexer native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=selected trunk: condition=db-pull in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=lexer native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=selected
playground-sqlite-db-apply	3.29 s	3.22 s	⚪ +75 ms (+2.3%)	✓	condition=db-apply to SQLite in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=parser native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=verified native_ast=WP_MySQL_Native_Parser_Node sqlite_driver_parser=verified trunk: condition=db-apply to SQLite in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=parser native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=verified native_ast=WP_MySQL_Native_Parser_Node sqlite_driver_parser=verified
Total	11.42 s	11.18 s	⚪ +236 ms (+2.1%)

_{Numbers carry runner noise; treat single-run deltas as directional, not authoritative.}

_{📈 Trunk performance history — commit-by-commit timeline.}

[adamziel]

Superseded by a single minimal PR based directly on trunk.