Resolve sanitized tool-name collisions consistently

Summary

Add deterministic collision resolution for sanitized tool names. Apply the resolved names consistently when tools are advertised and when tools are dispatched.

Rationale

sanitize_tool_name can map different original names to the same sanitized name. Existing collision paths include ASCII case normalization and over-length truncation. The non-ASCII fallback added in #7625 also uses a truncated hash, so it can collide in principle.

Current consumers can expose duplicate names or overwrite an earlier tool when a dispatch map uses a sanitized name as its key.

Affected areas

• lib/crewai/src/crewai/utilities/string_utils.py
• get_tool_names
• Tool dispatch-map construction in lib/crewai/src/crewai/utilities/tool_utils.py
• Related native function-calling schema generation and regression tests

Required changes

• Define one deterministic collision-resolution step for a collection of tools.
• Preserve the current sanitized name when it is unique.
• Add stable, deterministic suffixes for colliding names.
• Keep every resolved name within the 64-character provider limit.
• Use the same resolved names for advertised tool names and dispatch-map keys.
• Do not rely only on increasing the hash length or on convert_tools_to_openai_schema duplicate handling.

Acceptance criteria

• Distinct tools that sanitize to the same base name receive distinct resolved names.
• Resolution is stable for the same tool collection and ordering.
• Resolved names satisfy provider naming and length constraints.
• get_tool_names, generated schemas, and tool execution dispatch use matching resolved names.
• Tests cover case-normalization collisions, truncation collisions, and dispatch of each colliding tool.

Backlinks

• Pull request: https://github.com/crewAIInc/crewAI/pull/7625
• Review comment: https://github.com/crewAIInc/crewAI/pull/7625#discussion_r4053180631
• Requested by: @CodeWithMoin

Start in lib/crewai/src/crewai/utilities/string_utils.py with sanitize_tool_name and get_tool_names, then inspect dispatch-map construction in lib/crewai/src/crewai/utilities/tool_utils.py. Trace the related native function-calling schema generation and regression tests; done means colliding tools receive stable valid names and advertising, schemas, and dispatch use matching names.