codedb_remote: forward wiki limits consistently

[justrach]

Summary\n- forward limit for search, deps, branches, commits, and dep-history\n- forward offset for paged artifact actions\n- update hooks lab examples for bounded search/branches calls\n\n## Validation\n- zig build test\n- zig build -Doptimize=ReleaseFast\n- active /Users/blackfloofie/bin/codedb mcp dogfood: branches limit=3 returns 3, search limit=5 returns 5\n

[github-actions]

Benchmark Regression Report

Thresholds: 10.00% and 50,000 ns absolute delta

NOISE means the percentage threshold was exceeded, but the absolute delta was too small to fail CI.

Tool	Base (ns)	Head (ns)	Delta	Abs Delta (ns)	Status
codedb_bundle	515983	509458	-1.26%	-6525	OK
codedb_changes	55404	54343	-1.92%	-1061	OK
codedb_deps	9200	9765	+6.14%	+565	OK
codedb_edit	6110	9705	+58.84%	+3595	NOISE
codedb_find	62440	61704	-1.18%	-736	OK
codedb_hot	97043	98148	+1.14%	+1105	OK
codedb_outline	262912	274633	+4.46%	+11721	OK
codedb_read	89487	93664	+4.67%	+4177	OK
codedb_search	176662	178458	+1.02%	+1796	OK
codedb_snapshot	274984	269080	-2.15%	-5904	OK
codedb_status	209198	217961	+4.19%	+8763	OK
codedb_symbol	58327	59019	+1.19%	+692	OK
codedb_tree	46367	48223	+4.00%	+1856	OK
codedb_word	74405	68021	-8.58%	-6384	OK